Touch zip (4)
I believe the answer is:
dash
I believe this is a double definition.
'touch' is the first definition.
(I have seen 'A touch' mean 'dash' so perhaps 'touch' could also mean 'dash')
'zip' is the second definition.
(I've seen this before)
(Other definitions for dash that I've seen before include "Daring" , "Hasten; hyphen" , "Shatter - run" , "Hyphen; small quantity" , "Hurry; destroy (hopes)" .)