Near match for garment (7)
I believe the answer is:
nightie
'garment' is the definition.
(I've seen this before)
'near match' is the wordplay.
'near' becomes 'nigh' ('nigh' can be a synonym of 'near').
'match' becomes 'tie' (I've seen this before).
'nigh'+'tie'='NIGHTIE'
'for' acts as a link.
(Other definitions for nightie that I've seen before include "Coverage for the rest" , "Bedtime wear" , "Garment for ladies" , "Bed attire (colloq.)" , "Female bedwear" .)