Name of fish found in extreme parts of Western Samoa (5)

I believe the answer is:

wanda

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'name of fish' is the definition.
(as in the film A Fish Called Wanda)

I can't explain the remainder of the clue.

(Other definitions for wanda that I've seen before include "Female" , "Name of flower - or fish!" , "Fishy girl's name?" , "A Fish Called - - : film" , "so-called fish?" .)

I've seen this clue in The Irish Times.

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