Supporter chucking coin in the water? (4-6)
I believe the answer is:
well-wisher
I believe this clue is a double definition.
'supporter' is the first definition.
(I know that well-wisher is a type of supporter)
'chucking coin in the water?' is the second definition.
(as in a wishing well)
(Other definitions for well-wisher that I've seen before include "Someone hoping for another's happiness" , "Person concerned for another's welfare" , "One desiring another's happiness" , "Person sympathetic to a cause" .)