Crossword Genius

Fish for an ancient settler in Britain (5)

Ross

I believe the answer is:

angle

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'fish for' is the definition.
(thesaurus)

I can't explain the rest of the clue.

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(Other definitions for angle that I've seen before include "may be right" , "Early settler" , "member of tribe" , "Glean (anag.)" , "A way of approaching" .)

I've seen this clue in The Irish Independent.
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