Holiday dump (5)
I believe the answer is:
leave
This clue is a double definition.
'holiday' is the first definition.
(I've seen this before)
'dump' is the second definition.
(both can mean to break up with a partner)
(Other definitions for leave that I've seen before include "Go away on holiday" , "Permission (to take holidays?)" , "Green light" , "Exit" , "Skip" .)