Next to sex we French like wine (6)
I believe the answer is:
vinous
'like wine' is the definition.
(I've seen this before)
'next to sex we french' is the wordplay.
'next to' is a charade indicator (letters next to each other).
'sex' becomes 'VI' ('sex' is Latin for 'six' or VI in Roman numerals).
'we french' becomes 'nous' ('we' in French).
'vi' put next to 'nous' is 'VINOUS'.
(Other definitions for vinous that I've seen before include "Of or relating to wine" , "Like wine" .)