An understanding admirer? (8)
I believe the answer is:
follower
This clue might be a double definition.
'an understanding' is the first definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'admirer?' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for follower that I've seen before include "fan" , "Disciple" , "A loyal adherent - or a pursuer" , "One accepts the leadership of another" , "Supporter" .)