Open to debate (4)
I believe the answer is:
moot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">open to debate</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for moot that I've seen before include "Propose for discussion" , "Such a point is disputable" , "Such a point is arguable" , "Open to argument or debate" , "raise for discussion" .)