Ostensible reason (7)
I believe the answer is:
pretext
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ostensible reason</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pretext that I've seen before include "False reason as justification for an action" , "Reason put forward to conceal the true one" , "False reason, guise" , "Justification, excuse" , "Ostensible reason" .)