Beauty may have appeal over the phone (5)
I believe the answer is:
belle
'beauty' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for belle that I've seen before include "-- Epoque, before the Great War" , "Girl who's fetching" , "Beautiful woman - of the ball?" , "Reigning beauty" , "Beautiful girl" .)