Stepson swaps first prize for a head-turning hat (7)
I believe the answer is:
stetson
'hat' is the definition.
(I know that Stetson is a type of hat)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for stetson that I've seen before include "No tests (anag.)" , "Cowboy wear" , "Hat, for Texan oil magnate, say" , "Hat with wide brim and high crown, maybe a cowboy's" , "Felt hat" .)