Hungarian wine temperature's fine (5)
I believe the answer is:
tokay
'hungarian wine' is the definition.
(I've seen this before)
'temperature's fine' is the wordplay.
'temperature' becomes 't' (abbreviation).
'fine' becomes 'okay' (I've seen this before).
't'+'okay'='TOKAY'
(Other definitions for tokay that I've seen before include "Hungarian sweet wine" , "A wine mentioned in a national anthem" .)