A fellow member brought in something to wear (7)
I believe the answer is:
garment
'something to wear' is the definition.
'a fellow member brought in' is the wordplay.
'a fellow' becomes 'gent' ('gent' can be a synonym of 'fellow'**).
'member' becomes 'arm' (arm is a kind of member).
'brought in' is an insertion indicator.
'gent' placed around 'arm' is 'GARMENT'.
(Other definitions for garment that I've seen before include "Raiment" , "dress, perhaps" , "Covering" , "Perhaps shift" , "Piece of clothing" .)