Brother-hood? (4)

I believe the answer is:

cowl

I'm a little stuck... Click here to teach me more about this clue!

'hood?' is the definition.
(I know that cowl is a type of hood)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

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

I've seen this clue in The Globe and Mail.

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