Deny act I call not done on purpose (12)
I believe the answer is:
accidentally
'on purpose' is the definition.
Both the definition and answer are adverbs. Perhaps there's a link between them I don't understand?
'deny act i call not done' is the wordplay.
'deny act i call' can be anagrammed to 'ACCIDENTALLY'.
Though, I am not clear how this is indicated.
Can you help me to learn more?
(Other definitions for accidentally that I've seen before include "Inadvertently, by chance" , "Not purposefully, by mistake" .)