missing "and"  -- (MW) The untranslated word "and" is used as the conjunction, but it also is used to add emphasis ("also") and, In a series, it is can be translated as "not only...but also." When used in writing, it creates complex sentences, but when spoken, it makes a good pausing point so that an important or humorous word can follow.

Neither -- (CW) "Neither" is from me, which is the negative used in prohibitions and expressions of doubt meaning "not" and "no." The negative used here is the Greek negative of a subjective opinion, commands, and requests. This is the usual negative used with command since commands are an expression of opinion. The sense is "I don't want him" to do something, not that it isn't done or don't think something that might be true. If it wasn't done or wasn't true, the objective negative of fact would be used. The position is later in the verse, before the verb "return," the usual position for a negative command. This is not the word usually translated as "neither."

let -- This "let" is the helping verb used to translate the Greek form of the third-person command. In English,  commands are in the second-person, spoken to someone. Third-person commands are spoken about someone or something.  This form is used as something like our word "must."

him -- (WW) The word translated as "the" is the Greek definite article, which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

who  is -- (IW) There are no Greek words that can be translated as "is" in the source we use today nor was there one in the source that the KJV translators used. It follows the "and" or "also" that really begins the verse.

in - The word translated as "in" also means "within," "with," or "among."

the -- The word translated as "the" is the Greek definite article.  The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

field -- "Field" is the Greek word that means "farmland" or the "countryside" as opposed to "city."

turn -- "Turn back" is translated from a Greek word "to turn about" or "to turn around," but also means "cause to return" and "to turn one's mind towards" something. It is a third-person command that gets translated into English as a "let" phrase. Third-person commands are spoken about someone or something.  This form is used as something like our word "must."

back -- The term translated as "back" means "back" both in space and in time.

to  -- This "to" is from the infinitive form of the following verb.

take -- "(CW) Take" is from one of Jesus's favorite "multiple meaning" words. It is a verb that means "to raise up," "elevate," "to bear," "to carry off," "to take and apply to any use," and "to cause to cease." It is not the word commonly translated as "take" in the NT.  Its form means "to lift," or "wishes to lift up."  We would say "pick up" in English. This is not the common word translated as "take."

missing "the"  -- (MW) The untranslated word  is the Greek definite article, which usually precedes a noun and, without a noun, takes the meaning of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those"). See this article for more. 

his -- The word translated as "his" is the Greek word commonly translated as third-person pronouns in English.  This word appears after the noun so "of his."

clothes. --(CW) The word translated as "clothes" means an outer garment ("a cloak"), like we would use a coat or jacket today. This quality of this garment was how people judge social status. The word is not plural but singular.