Only time for a quantity of wine? (4)
I believe the answer is:
butt
'a quantity of wine?' is the definition.
(butt is a type of wine container)
'only time' is the wordplay.
'only' becomes 'but' (but can mean only - eg 'life is but a dream').
'time' becomes 't' (abbreviation).
'but'+'t'='BUTT'
'for' acts as a link.
(Other definitions for butt that I've seen before include "Blunt end - target of ridicule - hit with the head - cask - US backside" , "Cigar end" , "one ridiculed" , "What goat may do" , "Push with the head" .)