Eternal or infinite (7)
I believe the answer is:
endless
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">eternal</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">infinite</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for endless that I've seen before include "Occurring so frequently so as to seem uninterrupted" , "Non-stop" , "Going on forever, lacking conclusion" , "Eternal - unbroken" , "With no limit in sight" .)