Having plenty of room (8)
I believe the answer is:
spacious
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">having plenty of room</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for spacious that I've seen before include "Having plenty of room" , "Roomy or expansive" , "wide-ranging" , "Big and roomy" , "Roomy, not congested" .)