Popular detectives sat incapacitated (10)

I believe the answer is:

indisposed

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'incapacitated' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?

'popular detectives sat' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'detectives' becomes 'dis' (Detective Inspectors, DIs).
'sat' becomes 'posed' ('pose' can be a synonym of 'sit').
'in'+'dis'+'posed'='INDISPOSED'

Can you help me to learn more?

(Other definitions for indisposed that I've seen before include "Out of sorts" , "Poorly" , "Slightly unwell" .)

I've seen this clue in The Guardian.

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