Crossword Genius

Cavern phenomenon (4)

Ross

I believe the answer is:

echo

'cavern phenomenon' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for echo that I've seen before include "Sound bouncing back" , "Close imitation" , "E; reverberation" , "Evocation" , "Reverberation of sound" .)

I've seen this clue in the Newsday.
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