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More than one flier cries with energy in decline (7)

Ross

I believe the answer is:

shrikes

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

'more than one flier' is the definition.
(shrike is a kind of bird)

'cries with energy in decline' is the wordplay.
I cannot quite see how this works, but
'energy' could be 'ke' (K.E. is an example) and 'ke' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Times.
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