As someone who stirs up, I got a tar stirred up (8)
I believe the answer is:
agitator
'as someone who stirs up' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'i got a tar stirred up' is the wordplay.
'stirred up' is an anagram indicator (letters get stirred up or mixed).
'i'+'got'+'a'+'tar'='igotatar'
'igotatar' anagrammed gives 'AGITATOR'.
Can you help me to learn more?
(Other definitions for agitator that I've seen before include "Firebrand" , "One whipping up concern" , "Political troublemaker" , "One stirring up trouble" , "One who stirs things up, trouble-maker" .)