Would a hat trick go to his head? (6)
I believe the answer is:
bowler
This could be a double definition.
'would a hat trick go to his' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'head?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for bowler that I've seen before include "Caddick; hat" , "Cricket player or hard hat" , "Sportsman" , "Hard hat for cricket thrower" , "Hat that is round and hard with a narrow brim" .)