One in bed that's smoked (6)
I believe the answer is:
kipper
I believe this is a double definition.
'one in bed' is the first definition.
(someone having a kip or sleep)
'that's smoked' is the second definition.
(as in smoked kippers)
(Other definitions for kipper that I've seen before include "Cured fish (one having forty winks?)" , "Preserved herring" , "Smoked fish" , "One smoked" , "(Fishy) type of tie" .)