Provide information in French repeatedly about match? (9)
I believe the answer is:
enlighten
'provide information' is the definition.
'in french repeatedly about match?' is the wordplay.
'in french' becomes 'en' ('en' can be French for 'in' e.g. en France).
'repeatedly' indicates the doubling of some letters.
'about' means one lot of letters goes inside another.
'match?' becomes 'light' (I've seen this in other clues).
'en' duplicated is 'enen'.
'enen' placed around 'light' is 'ENLIGHTEN'.
(Other definitions for enlighten that I've seen before include "Give knowledge and understanding to" , "Give information to" , "Impart knowledge to" , "Give knowledge to, inform" , "Illuminate" .)