Wide-brimmed hat (7)
I believe the answer is:
stetson
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wide-brimmed hat</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stetson that I've seen before include "Hat, for Texan oil magnate, say" , "Hat, for country-and-western singer perhaps" , "Hat with wide brim and high crown, maybe a cowboy's" , "Ten-gallon hat" , "St Neots (anag.)" .)