Crossword Genius

Cold hooter? Monks wear this (4)

Ross

I believe the answer is:

cowl

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'monks wear this' is the definition.
The definition suggests a singular noun which matches the answer.

'cold hooter?' is the wordplay.
'cold' becomes 'c' (eg on taps).
'hooter?' becomes 'owl' (owls hoot).
'c'+'owl'='COWL'

Can you help me to learn more?

(Other definitions for cowl that I've seen before include "Cover for monk or chimney" , "Hood-shaped covering" , "Monk's hooded habit" , "form of protection?" , "Monk's hood - chimney cover" .)

I've seen this clue in The Sun.
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