Underwear seen in bed (8)
I believe the answer is:
bloomers
This clue is a double definition.
'underwear' is the first definition.
(I've seen this before)
'seen in bed' is the second definition.
(blooming flowers in a flower bed)
(Other definitions for bloomers that I've seen before include "rational dress" , "Mistakes, underpants, loaves or flowers" , "Old underwear" , "Loose-fitting knickers" , "displayed in bed" .)