Gearwheel turning container for high-quality spirit (6)
I believe the answer is:
cognac
'high-quality spirit' is the definition.
(alcoholic spirit)
'gearwheel turning container' is the wordplay.
'gearwheel' becomes 'cog' (I've seen this in another clue).
'turning' shows that the letters should be reversed in order.
'container' becomes 'can' (can is a kind of container).
'can' reversed gives 'nac'.
'cog'+'nac'='COGNAC'
'for' is the link.
(Other definitions for cognac that I've seen before include "Brandy of the French Charente" , "(French district famed for) fine brandy" , "French town - French brandy" , "French brandy region" , "High quality brandy" .)