A reflection of soundwaves; repetition of sound (4)

I believe the answer is:

echo

(Other definitions for echo that I've seen before include "Reverberate - nymph spurned by Narcissus" , "Sound bouncing back" , "Greek girl in love with Narcissus" , "Greek nymph, spurned by Narcissus, who pined away until only her voice remained" , "letter we hear" .)

I've seen this clue in the Sydney Morning Herald.

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