Crossword Genius

A reverberating of bells on radio is pleasing (9)

Ross

I believe the answer is:

appealing

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'is pleasing' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

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(Other definitions for appealing that I've seen before include "Attractive, interesting" , "winning" , "Challenging a judgment" , "Charming" , "Making a heartfelt request" .)

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