Forever and a day (8)
I believe the answer is:
eternity
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">forever and a day</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 eternity that I've seen before include "Endless duration" , "Age" , "Unending time" , "the poet palmed in an hour?" , "I try teen (anag.)" .)