Soak vessel and put back (6)
I believe the answer is:
Here is my best explanation:
'put back' is the definition.
'soak vessel' is the wordplay.
'soak' becomes 'ret' (ret can mean to soak in water).
'vessel' becomes 'urn' (urn is a kind of vessel).
'and' acts as a link.
(Other definitions for return that I've seen before include "proceeds", "Go/come back", "get back to original state", "Proceeds", "Come back with financial statement", "Retort", "Send/come back", "second half of journey", "Come or give back" and "Go, come or bring back".)