Founded (on) (5)
I believe the answer is:
based
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">founded on</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 based that I've seen before include "Worthless" , "Founded or used as evidence" , "Located" , "Founded, grounded" , "Established" .)