Crossword Genius

Daughter, with bad back, in decline (5)

Ross

I believe the answer is:

droop

'decline' is the definition.
(I've seen this before)

'daughter with bad back' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'with' is a charade indicator (letters next to each other).
'bad' becomes 'poor' (similar in meaning).
'back' says the letters should be written backwards.
'poor' back-to-front is 'roop'.
'd'+'roop'='DROOP'

'in' is the link.

(Other definitions for droop that I've seen before include "Sag wearily" , "Hang down loosely" , "lose heart" , "Flag" , "be despondent" .)

I've seen this clue in The Telegraph.
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