Crossword Genius

Unusual tests on a hat (7)

Ross

I believe the answer is:

stetson

'a hat' is the definition.
(Stetson is an example)

'unusual tests on' is the wordplay.
'unusual' indicates an anagram.
'tests' with letters rearranged gives 'stets'.
'stets'+'on'='STETSON'

(Other definitions for stetson that I've seen before include "Hat with broad brim and high crown" , "No tests (anag.)" , "capital item" , "Ten-gallon hat" , "Capital investment" .)

I've seen this clue in the Evening Standard.
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