Liaison with a French blonde? (6)
I believe the answer is:
affair
'liaison' is the definition.
('affair' can be a synonym of 'liaison')
'with a french blonde?' is the wordplay.
'with' is a charade indicator (letters next to each other).
'french' becomes 'f'.
'blonde?' becomes 'fair' ('fair' can be similar in meaning to 'blonde').
'a' put next to 'f' is 'af'.
'af'+'fair'='AFFAIR'
(Other definitions for affair that I've seen before include "Secret liaison" , "Thing to be done with raffia" , "See 23" , "Secret sexual relationship" , "Involvement" .)