Crossword Genius

Ailing popular company (6)

Ross

I believe the answer is:

infirm

'ailing' is the definition.
(thesaurus)

'popular company' is the wordplay.
'popular' becomes 'in'.
'company' becomes 'firm' (I've seen this before).
'in'+'firm'='INFIRM'

(Other definitions for infirm that I've seen before include "Debilitated" , "Frail" , "not so healthy" , "Feeble, decrepit" , "stable? No" .)

I've seen this clue in The Telegraph.
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