Definition of baritone (sound) one may check on phone? (9)
I believe the answer is:
voicemail
'definition of baritone' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'sound one may check on phone?' is the wordplay.
I cannot quite see how this works, but
'sound' could be 'voice' (voice is a kind of sound) and 'voice' is found in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found within the answer.
The remaining letters 'mal' 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?
(Another definition for voicemail that I've seen is " What's reached, when someone can't be reached!".)