Not the same with identity as monarch no longer reluctant to speak out? (9)

I believe the answer is:
diffident
'out?' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'not the same with identity as monarch no longer reluctant to speak' is the wordplay.
I cannot quite understand how this works, but
'not' could be 'nt' (synonyms) and 'nt' is found within the answer.
'identity' could be 'id' (abbreviation) and 'id' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for diffident that I've seen before include "Timid" , "Shy" , "Bashful" , "Reluctant to come forward" , "Lacking self-confidence" .)
