On a higher floor (8)
I believe the answer is:
upstairs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">on a higher floor</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for upstairs that I've seen before include "On a higher floor" , "flight" , "on another level" , "Having taken steps to rise" , "It's a spur (anag)" .)