Wine, round cheese, and fresh air (7)
I believe the answer is:
madeira
'wine' is the definition.
(Madeira is an example)
'round cheese and fresh air' is the wordplay.
'round' says the letters should be written in reverse.
'cheese' becomes 'edam' (Edam is an example).
'and' is a charade indicator (letters next to each other).
'fresh' is an anagram indicator (a fresh re-ordering of the letters).
'edam' back-to-front is 'made'.
'air' is an anagram of 'ira'.
'made'+'ira'='MADEIRA'
(Other definitions for madeira that I've seen before include "Sponge-cake" , "Rich, fortified white wine" , "Portuguese island, capital Funchal" , "Island in the Atlantic Ocean" , "Portuguese North Atlantic island" .)