Changes at home and goes to bed (5,2)
I believe the answer is:
turns in
'goes to bed' is the definition.
('turn in' can be a synonym of 'go to bed')
'changes at home' is the wordplay.
'changes' becomes 'turns' (turn is a kind of change).
'at home' becomes 'in' (similar in meaning).
'turns'+'in'='TURNS-IN'
'and' acts as a link.
(Other definitions for turns in that I've seen before include "Voluntarily hands over" , "goes to bed" , "Retires" , "Goes home" .)