Bed's favourite, everyone accepted (6)
I believe the answer is:
pallet
'bed's' is the definition.
(I've seen this in another clue)
'favourite everyone accepted' is the wordplay.
'favourite' becomes 'pet' (synonyms).
'everyone' becomes 'all' (all people).
'accepted' is an insertion indicator.
'pet' enclosing 'all' is 'PALLET'.
(Other definitions for pallet that I've seen before include "Wooden platform for moving and storing goods" , "Mattress stuffed with straw" , "Tray for lifting and stacking goods" , "Forklift truck's tray" , "heraldic strip" .)