Sceptical or acting so anyhow (8)

I believe the answer is:

agnostic

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'sceptical' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I can't see?

'acting so anyhow' is the wordplay.
'anyhow' indicates anagramming the letters.
'acting'+'so'='actingso'
'actingso' with letters rearranged gives 'AGNOSTIC'.

'or' is the link.

Can you help me to learn more?

(Other definitions for agnostic that I've seen before include "Religiously non-commital" , "Holding that knowledge of Supreme Being is impossible" , "Questioning" , "Coasting (anag)" , "Doubtful, non-committal" .)

I've seen this clue in The Sunday Times.

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