Releases grip and fires (4,2)
I believe the answer is:
lets go
This clue might be a double definition.
'releases grip' is the first definition.
'lets go' can be an answer for 'releases' ('let go' can be a synonym of 'release'). I'm not certain of the 'grip' bit.
'fires' is the second definition.
(I've seen this before)
'and' is the link.
Can you help me to learn more?
(Other definitions for lets go that I've seen before include "fires" , "Come on then, we're off!" , "Order to leave" , "Liberates" , "Releases from one's grip" .)