Deeply echoing or reverberating (8)

I believe the answer is:

resonant

(Other definitions for resonant that I've seen before include "Deep and vibrating" , "(Of sound) deep, clear and continuing to ring" , "Not saner (anag) - ringing" , "Ringing - earn tons (anag)" , "Resounding, ringing" .)

I've seen this clue in The Times.

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