Breakfast perhaps for one in bed? (6)
I believe the answer is:
kipper
I believe this is a double definition.
'breakfast perhaps' is the first definition.
(kippers might be eaten for breakfast)
'one in bed?' is the second definition.
(someone having a kip or sleep)
'for' is the link.
(Other definitions for kipper that I've seen before include "part of breakfast?" , "Dried and smoked herring" , "being in bed?" , "(Fishy) type of tie" , "One smoked" .)