Crossword Genius

Fastener apt to give way?

Ross

I believe the answer is:

buckle

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'give way?' is the definition.
(buckling is a kind of giving way)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for buckle that I've seen before include "Crumple under pressure, like shoe clasp" , "Crumple under pressure, or belt fastener" , "Give way to pressure" , "Collapse under pressure" , "It's attached to a belt or shoe" .)

I've seen this clue in the Evening Standard.
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