Release some pressure (4)
I believe the answer is:
vent
(Other definitions for vent that I've seen before include "Discharge; give expression to" , "Slit in the back of a jacket" , "Air passage" , "Opening releasing gas" , "pipe" .)
I believe the answer is:
vent
(Other definitions for vent that I've seen before include "Discharge; give expression to" , "Slit in the back of a jacket" , "Air passage" , "Opening releasing gas" , "pipe" .)