Crossword Genius

Sonar echo (4)

Ross

I believe the answer is:

ping

'sonar echo' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ping that I've seen before include "Abrupt high-pitched ringing sound" , "Sharp ringing sound" , "Short high-pitched sound" .)

I've seen this clue in The Times.
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