Poet's "before" (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">poet's before</span>' is the definition.<br/ ><span class="explanation-format__explanation">(poetic term for 'before')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ere that I've seen before include "Before (lit.)" , "Before, poetically" , "Archaic word for before - a palindrome" , "Before (in time)" , "Old word for before" .)