Unending time (8)
I believe the answer is:
eternity
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unending time</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 eternity that I've seen before include "destination of film?" , "Ages and ages" , "the poet palmed in an hour?" , "Endless period" , "You never come to the end of this" .)