A sound way to call the doctor (5)
I believe the answer is:
bleep
'a sound' is the definition.
(bleep is a kind of sound)
'way to call the doctor' is the wordplay.
I cannot really understand how this works, but
'way' could be 'l' (abbreviation for left) and 'l' is present in the answer.
The remaining letters 'beep' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bleep that I've seen before include "Make short shrill signalling sound" , "High pitched signal" , "Electronic noise signal" , "covers swearing" , "Noise of alarm" .)