I'm unlikely to catch bishop, say, with quantities of booze (13)
I believe the answer is:
butterfingers
'i'm unlikely' is the definition.
I can't judge whether this defines the answer.
'bishop say with quantities of booze' is the wordplay.
'bishop' becomes 'B' (abbreviation for bishop in chess).
'say' becomes 'utter' (to utter something is to say or speak it).
'with' says to put letters next to each other.
'quantities of booze' becomes 'fingers' (I can't justify this - if you can you should believe this answer much more).
'b'+'utter'+'fingers'='BUTTERFINGERS'
'to catch' is the link.
Can you help me to learn more?
(Other definitions for butterfingers that I've seen before include "Careless person" , "Someone who drops things" , "Bad catcher" , "Clumsy person who drops things" , "He can't catch for toffee!" .)