Chaps dismiss all efforts holding them up (6)

I believe the answer is:

fellas

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'chaps' is the definition.
('fella' can be a synonym of 'chap')

'dismiss all efforts holding them up' is the wordplay.
'FELLAS' is hidden back-to-front in amongst the letters.
However, I am unsure how this is indicated.

Can you help me to learn more?

(Another definition for fellas that I've seen is " Men".)

I've seen this clue in The Irish Times.

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