Knowledge of mostly easy answer condemned (9)
I believe the answer is:
awareness
'knowledge' is the definition.
(awareness is a kind of knowledge)
'mostly easy answer condemned' is the wordplay.
'mostly' means to remove the last letter.
'condemned' indicates an anagram.
'easy' with its final letter taken away is 'eas'.
'eas'+'answer'='easanswer'
'easanswer' anagrammed gives 'AWARENESS'.
'of' acts as a link.
(Other definitions for awareness that I've seen before include "Consciousness, knowingness" , "Perception" , "Knowing" , "Knowledge or consciousness" , "Knowledge (of a fact)" .)