The French friend brought back part of jacket (5)
I believe the answer is:
lapel
'part of jacket' is the definition.
(I've seen this before)
'the french friend brought back' is the wordplay.
'the french' becomes 'le'.
'friend' becomes 'pal' (pal is a kind of friend).
'brought back' says the letters should be written in reverse.
'le'+'pal'='lepal'
'lepal' back-to-front is 'LAPEL'.
(Other definitions for lapel that I've seen before include "Continuation of a coat collar" , "Part of a suit jacket" , "Turnover at the front of a coat" , "Extended part of a collar" , "Turned-back part of coat collar" .)