Touch and run (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')
'run' is the second definition.
(I know that dash is a type of run)
'and' acts as a link.
(Other definitions for dash that I've seen before include "Short fast run" , "Run fast with flair" , "Hurl; rush" , "rats" , "Hyphen; small quantity" .)