Depart hurriedly (7)
I believe the answer is:
vamoose
'depart hurriedly' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for vamoose that I've seen before include "Fly" , "Depart hurriedly" , "Do a runner" , "Shoo!" , "Skedaddle - some ova (anag)" .)