Weak-looking female bird (5)

I believe the answer is:

frail

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'weak' is the definition.
(I know that weak can be written as frail)

'looking female bird' is the wordplay.
'looking female' becomes 'f' (common abbreviation. I am not sure about the 'looking' bit.).
'bird' becomes 'rail' (a wading bird).
'f'+'rail'='FRAIL'

Can you help me to learn more?

(Other definitions for frail that I've seen before include "Physically weak, delicate" , "rush" , "Easily destroyed" , "Weak, feeble" , "Old woman" .)

I've seen this clue in The Telegraph.

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