Overheard legend resisting wine (7)
I believe the answer is:
chianti
'wine' is the definition.
(Chianti is an example)
'overheard legend resisting' is the wordplay.
'overheard' indicates a 'sounds like' (homophone) clue.
'legend' becomes 'key' (legend can mean a key on a map or diagram).
'resisting' becomes 'anti'.
'key' is a homophone of 'chi'.
'chi'+'anti'='CHIANTI'
(Other definitions for chianti that I've seen before include "Italian offering" , "Dry red Italian wine" , "Italian wine variety" , "Popular dry red wine of Tuscany" , "Tuscan red wine" .)