Plant in another bed (4)
I believe the answer is:
herb
'plant' is the definition.
(herb is a kind of plant)
'in another bed' is the wordplay.
'in' says the answer is hidden in the clue.
'HERB' is hidden within 'another bed'.
(Other definitions for herb that I've seen before include "plant with useful properties" , "Parsley, for instance" , "Basil, for example, is one" , "Chives or coriander, say" , "Simple" .)