Tediously unoriginal (5)
I believe the answer is:
banal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tediously unoriginal</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 banal that I've seen before include "Boring or trivial" , "Trite or fatuous" , "Stock" , "Ordinary and uninteresting" , "'Hackneyed, trite (5)'" .)