Specious excuse (7)
I believe the answer is:
pretext
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">specious excuse</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 pretext that I've seen before include "Insincere excuse" , "Ostensible motive" , "False reason, guise" , "Alleged reason" , "Specious excuse" .)