Not knowing and acting so strangely (8)
I believe the answer is:
agnostic
'not knowing' is the definition.
Both the answer and definition are adjectives.
Perhaps you can see a link between them that I can't see?
'acting so strangely' is the wordplay.
'strangely' indicates anagramming the letters.
'acting'+'so'='actingso'
'actingso' anagrammed gives 'AGNOSTIC'.
'and' is the link.
Can you help me to learn more?
(Other definitions for agnostic that I've seen before include "Not sure" , "Doubter of God" , "Doubter - coatings (anag)" , "Doubting, non-commital" , "A non-believer in God, coasting along" .)