Nothing in good French gift (4)
I believe the answer is:
boon
'gift' is the definition.
(I've seen this in another clue)
'nothing in good french' is the wordplay.
'nothing' becomes 'O' (O resembles 0).
'in' is an insertion indicator.
'good french' becomes 'bon' ('good' in French).
'o' put within 'bon' is 'BOON'.
(Other definitions for boon that I've seen before include "Something beneficial - a blessing" , "Benefaction" , "Favour, request" , "A benefit, goes with blessing" , "Blessing - sort of companion?" .)