Cream shown in one's cups (7)
I believe the answer is:
pickled
'in one's cups' is the definition.
(informal term meaning drunk)
'cream shown' is the wordplay.
'cream' becomes 'pick' (both can mean the best of something).
'shown' becomes 'led'.
'pick'+'led'='PICKLED'
(Other definitions for pickled that I've seen before include "Preserved - drunk" , "Drunk (as a gherkin?)" , "Blotto" , "Preserved in vinegar or brine" , "Brahms and Liszt" .)