Four-poster, say (3)
I believe the answer is:
bed
'four-poster say' is the definition.
(four-poster is a kind of bed)
This is the entire clue.
(Other definitions for bed that I've seen before include "might be laid here" , "Piece of furniture" , "e.g. Four-poster" , "Couch" , "One with flower, sleeper, in" .)