A sound way to make amends (5)
I believe the answer is:
atone
'to make amends' is the definition.
(to atone is to make amends for a wrong deed)
'a sound' is the wordplay.
'sound' becomes 'tone' (tone is a kind of sound).
'a'+'tone'='ATONE'
'way' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for atone that I've seen before include "remedy" , "Make amends (for something)" , "Make up for wrong done" , "In agreement - sounds singular" , "Turn away from sin and do penance" .)