Hebridean island almost rounded by fellow settler (7)
I believe the answer is:
pioneer
'settler' is the definition.
(I know that pioneer is a type of settler)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for pioneer that I've seen before include "Trailblazer - initiate" , "One who blazes the trail for others" , "Lead the way" , "Research leader" , "Groundbreaker" .)