See about shelter, being ready for bed (6)
I believe the answer is:
sleepy
'ready for bed' is the definition.
(I've seen this in another clue)
'see about shelter' is the wordplay.
'see' becomes 'spy' (spy can mean to see or observe).
'about' means one lot of letters goes inside another.
'shelter' becomes 'lee' (as in lee side, the side sheltered from wind).
'spy' going around 'lee' is 'SLEEPY'.
'being' is the link.
(Other definitions for sleepy that I've seen before include "(Of place) low in activity" , "Drowsy - without excitement" , "Feeling like having a snooze" , "Doc's nodding pal" , "One of the Seven Dwarfs" .)