Large ape playing bingo with bottle top (6)
I believe the answer is:
gibbon
'large ape' is the definition.
(type of ape)
'playing bingo with bottle top' is the wordplay.
'playing' indicates an anagram.
'with' means one lot of letters goes inside another.
'top' suggests taking the first letters.
The first letter of 'bottle' is 'b'.
'bingo' anagrammed gives 'gibon'.
'gibon' enclosing 'b' is 'GIBBON'.
(Other definitions for gibbon that I've seen before include "Writer" , "MONKEY" , "Animal" , "Type of ape" , "Small ape - famous historian" .)