Old country jazz fan coming to dance (6)
I believe the answer is:
cathay
'old country' is the definition.
(historic name for China)
'jazz fan coming to dance' is the wordplay.
'jazz fan' becomes 'cat' (I've seen this before).
'coming to' is a charade indicator (letters next to each other).
'dance' becomes 'hay' (type of country dance).
'cat'+'hay'='CATHAY'
(Other definitions for cathay that I've seen before include "China long ago" , "Ancient China" , "Name for China in medieval Europe" , "poetic land" , "Old name for China with a feline to start" .)