Long pillow (7)
I believe the answer is:
bolster
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">long pillow</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bolster that I've seen before include "support for head after retiring" , "Chisel - long cushion" , "Prop up with long pillow" , "Support - strengthen" , "Shore up" .)