Flier among quickest released (7)

I believe the answer is:

kestrel

'flier' is the definition.
(kestrel is a kind of birdanimal)

'among quickest released' is the wordplay.
'among' says the answer is hidden in the clue.
'KESTREL' is hidden within 'quickest released'.

(Other definitions for kestrel that I've seen before include "It takes mice" , "Small type of falcon" , "Bird of prey" , "High flier" , "Small species of falcon" .)

I've seen this clue in The Telegraph.

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