As worn with a scowl, perhaps? (5)

I believe the answer is:

cowls

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'as worn with a' is the definition.
I can't judge whether this defines the answer.

'scowl perhaps?' is the wordplay.
'perhaps?' indicates anagramming the letters (I've seen 'perhaps' mean this).
'scowl' is an anagram of 'COWLS'.

Can you help me to learn more?

(Other definitions for cowls that I've seen before include "Coverings" , "Monks' hoods" .)

I've seen this clue in the Evening Standard.

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