Agitator trots peer out (9)
I believe the answer is:
protester
'agitator' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'trots peer out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'trots'+'peer'='trotspeer'
'trotspeer' anagrammed gives 'PROTESTER'.
Can you help me to learn more?
(Other definitions for protester that I've seen before include "objector" , "Dissident" , "Demonstrator" , "Demonstrating kind" , "Person, we hear, not content" .)