Possibly become jolly having acquired rounds each (2,2,3)
I believe the answer is:
go to sea
'possibly become jolly' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'acquired rounds each' is the wordplay.
I cannot really understand how this works, but
'acquired' could be 'got' ('get' can be a synonym of 'acquire') and 'got' is found within the answer.
'each' could be 'ea' (abbreviation) and 'ea' is found within the answer.
The remaining letters 'os' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'having' is the link.
Can you help me to learn more?
(Other definitions for go to sea that I've seen before include "set sail" , "live off the land" , "Become a sailor" , "Leave working on the land" .)