Put away gun left among others wrongly (7)
I believe the answer is:
holster
'put away gun' is the definition.
(to put a gun in a holster)
'left among others wrongly' is the wordplay.
'left' becomes 'l' (common abbreviation).
'among' means one lot of letters goes inside another (inserted letters are placed among others).
'wrongly' is an anagram indicator.
'others' with letters rearranged gives 'hoster'.
'l' put inside 'hoster' is 'HOLSTER'.
(Other definitions for holster that I've seen before include "Holder for a hand-gun" , "that carries a gun" , "Leather case" , "Gun-holder" , "Receptacle for a hand-gun" .)