Reverend’s sad expression replicated with perfect tune (5-5)

I believe the answer is:

clear-toned

I'm a little stuck... Click here to teach me more about this clue!

'reverend's sad expression' is the definition.
I can't judge whether this defines the answer.

'replicated with perfect tune' is the wordplay.
'replicated' becomes 'cloned' (I've seen this in another clue).
'with' indicates putting letters inside.
'perfect tune' becomes 'eart' (I am not sure about this - if you are sure you should believe this answer much more).
'cloned' enclosing 'eart' is 'CLEAR-TONED'.

Can you help me to learn more?

I've seen this clue in The Hindu.

Want a hint initially instead of a full solution? Install my app