Some backed cappuccino, some tea (5)
I believe the answer is:
cuppa
'some tea' is the definition.
(cuppa is a kind of tea)
'some backed cappuccino' is the wordplay.
'backed' is a reversal indicator.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'appuc' is hidden within 'cappuccino'.
'appuc' backwards is 'CUPPA'.
(Other definitions for cuppa that I've seen before include "Drink of tea (informal)" , "Drink of tea (colloq.)" , "Refreshing brew" .)