Double-crosses (7)
I believe the answer is:
betrays
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">double-crosses</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for betrays that I've seen before include "Gives away" , "Sells" , "Shows unintentionally, say feelings" , "Double-crosses" , "shops" .)