The French friend comes back for part of jacket (5)
I believe the answer is:
lapel
'part of jacket' is the definition.
(I've seen this before)
'the french friend comes back' is the wordplay.
'the french' becomes 'le' ('the' in French).
'friend' becomes 'pal' (pal can mean a friend).
'comes back' says the letters should be written backwards.
'le'+'pal'='lepal'
'lepal' reversed gives 'LAPEL'.
'for' acts as a link.
(Other definitions for lapel that I've seen before include "Part of a suit jacket" , "Folded-back part of coat" , "top of coat" , "Folded flap at front of jacket or coat" , "Folded back part of jacket" .)