Go to bed (6)
'go to bed' is the definition.
(synonyms)
This is all the clue.
(Other definitions for turn in that I've seen before include "Hand over - retire" , "rat on" , "Go to bed, changing direction" , "Go to bed (informal)" , "Informally, go to bed or hand over" .)
'go to bed' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for retire that I've seen before include "Leave work; go back" , "Withdraw - give up work - go to bed" , "Give up work for good" , "Step down" , "Cease working" .)