Scoot, scram (9)
I believe the answer is:
skedaddle
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">scoot</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">scram</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for skedaddle that I've seen before include "split" , "Hightail it" , "Depart hurriedly" , "Run off hurriedly (colloq.)" , "In slang, go away quickly, scoot" .)