Maybe it's buckled (5)

I believe the answer is:

strap

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'maybe it's buckled' is the definition.
I can't tell whether this defines the answer.

'maybe it's buckled' is the wordplay.
'maybe' indicates an anagram.
'buckled' becomes 'rap' (I can't explain this - if you can you should give a lot more credence to this answer).
'ts' with letters rearranged gives 'st'.
'st'+'rap'='STRAP'

Can you help me to learn more?

(Other definitions for strap that I've seen before include "Strong band for binding luggage etc" , "Beat; securing band" , "Whip" , "Leather thong" , "Fasten; punishment" .)

I've seen this clue in the Evening Standard.

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