Spheroid (5)
I believe the answer is:
round
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spheroid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for round that I've seen before include "Description of Tweedledum" , "with 6D [SPARE TYRE]" , "Circular - 18 holes" , "(Of voice) rich, mellow" , "unsuitable for square pegs" .)