Top gangster seizing most of composer's drink (10)
I believe the answer is:
cappuccino
'drink' is the definition.
(I've seen this before)
'top gangster seizing most of composer's' is the wordplay.
'top gangster' becomes 'capo' (mafia boss. I am not sure about the 'top' bit.).
'seizing' means one lot of letters goes inside another (inserted letters are seized).
'most of' means to remove the last letter.
'composer' becomes 'Puccini' (Giacomo Puccini).
'puccini' with its last letter taken off is 'puccin'.
'capo' placed around 'puccin' is 'CAPPUCCINO'.
Can you help me to learn more?
(Other definitions for cappuccino that I've seen before include "Type of coffee" , "Drink" , "Frothy coffee" .)