Game in hall not finished for crooner (4)
I believe the answer is:
bing
'crooner' is the definition.
(Bing Crosby)
'game in hall not finished' is the wordplay.
I cannot really see how this works, but
'in' is found in the answer.
This explanation may well be incorrect...
'for' acts as a link.
Can you help me to learn more?
(Other definitions for bing that I've seen before include "The Old Groaner" , "Daddy of the crooners . . . . Crosby" , "Sobriquet of Harry Lillis Crosby" , "-- Crosby, singer" .)