Crossword Genius

Fish-finding aid (5)

Ross

I believe the answer is:

sonar

'fish-finding aid' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for sonar that I've seen before include "What a near-blind creature uses" , "Underwater navigation device" , "Method of echolocation" , "Underwater detector" , "location device" .)

I've seen this clue in the Newsday.
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