Speed or spree (4)
I believe the answer is:
tear
This clue is a double definition.
'speed' is the first definition.
(I know that tear is a more specific form of the action speed)
'spree' is the second definition.
(I've seen this in another clue)
(Other definitions for tear that I've seen before include "charge" , "Droplet from the eye" , "Optical sign of sorrow" , "Rush - to pull apart" , "Rip apart; drop" .)