Not having a match in clothing (4)
I believe the answer is:
vest
'clothing' is the definition.
(vest is a kind of clothing)
'not having a match' is the wordplay.
'not having' indicates named letters should be taken away.
'match' becomes 'vesta' (type of historical wooden match).
'vesta' with 'a' removed is 'VEST'.
'in' acts as a link.
(Other definitions for vest that I've seen before include "American version of waistcoat" , "Sleeveless garment" , "Undergarment to put in right of possession" , "Thesaurus compiler" , "Waistcoat (in USA)" .)