Pillow (7)
'pillow' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cushion that I've seen before include "See 9" , "Buffer" , "Part of a billiard table" , "Pad on sofa" , "Soften (the effect of an impact)" .)
'pillow' is the definition.
(I know that bolster is a type of pillow)
This is the entire clue.
(Other definitions for bolster that I've seen before include "Support - strengthen" , "Strengthen - long pillow" , "Reinforce; a cushion" , "Long thick pillow" , "Extended pillow" .)