Supported by both sides (10)
I believe the answer is:
bipartisan
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">supported by both sides</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 bipartisan that I've seen before include "As is cooperation between two parties" , "Involving agreement across political divides" , "Involving the agreement of two parties" , "using both sides" , "Cooperative" .)