Surrey town: agree it’s evolving (7)
I believe the answer is:
reigate
'surrey town' is the definition.
(I've seen this before)
'agree it's evolving' is the wordplay.
'agree it' can be anagrammed to 'REIGATE'.
Though, I'm not sure how this is indicated.
Can you help me to learn more?
(Other definitions for reigate that I've seen before include "place in Surrey" , "English town" , "Surrey town" .)