Shared trifle around at home (5)
I believe the answer is:
joint
'shared' is the definition.
(similar in meaning)
'trifle around at home' is the wordplay.
'trifle' becomes 'jot' (both can mean a small amount).
'around' means one lot of letters goes inside another.
'at home' becomes 'in' (similar in meaning).
'jot' placed around 'in' is 'JOINT'.
(Other definitions for joint that I've seen before include "Shared, held in common" , "Bone junction" , "Flexible link" , "Knee or elbow?" , "Cut of meat; mutual" .)