Extremist adviser? (7)
I believe the answer is:
tipster
This clue might be a double definition.
'extremist' is the first definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'adviser?' is the second definition.
(tipster is a kind of adviser)
Can you help me to learn more?
(Other definitions for tipster that I've seen before include "One with views on race" , "One providing betting hints" , "Seller of information on racecourse etc" , "Gambling advisor" , "Person offering advice" .)