Crossword Genius

Hebridean island almost rounded by fellow settler (7)

Ross

I believe the answer is:

pioneer

I'm a little stuck... Click here to teach me more about this clue!

'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" .)

I've seen this clue in The Telegraph.
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