Sets up society for revolutionary over Border with a number of supporters (8)
I believe the answer is:
admirers
'supporters' is the definition.
('admirer' can be a synonym of 'supporter')
'sets up society for revolutionary over border with a number' is the wordplay.
I cannot quite see how this works, but
'society' could be 's' (common abbreviation in names of organisations) and 's' is present in the answer.
'over' could be 're' and 're' is found in the answer.
'a' is found in the answer.
'number' could be 'm' (M is an example) and 'm' is located in the answer.
This may be the basis of clue (or it may be nonsense).
'of' is the link.
Can you help me to learn more?
(Other definitions for admirers that I've seen before include "Fans; devotees" , "Would-be boyfriends" , "Fans; lovers" .)