Top star of opera cut over drink (10)
I believe the answer is:
cappuccino
'drink' is the definition.
(I've seen this before)
'top star of opera cut' is the wordplay.
I cannot really see how this works, but
'top' could be 'cap' (both can mean to beat or outdo) and 'cap' is present in the answer.
'of' could be 'o' and 'o' is found in the answer.
This explanation may well be incorrect...
'over' acts as a link.
Can you help me to learn more?
(Other definitions for cappuccino that I've seen before include "Drink" , "Type of coffee" , "Frothy coffee" .)