Understanding supporters? (9)
I believe the answer is:
followers
'understanding supporters?' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe they are linked in a way I don't understand?
This is the entire clue.
Can you help me to learn more?
(Other definitions for followers that I've seen before include "Devotees, fans" , "Supporters, disciples" .)