Enclose a brooch (5)

I believe the answer is:

clasp

I believe this is a double definition.

'enclose' is the first definition.
(thesaurus)

'a brooch' is the second definition.
(I know that brooch can be written as clasp)

(Other definitions for clasp that I've seen before include "Hook" , "Catch; embrace" , "Grip firmly" , "bosom" , "Jewellery fastener" .)

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

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