8 down
HQ
excited
with
parachute
action
(4,7)
HQ excited with parachute action (4,7)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition here is parachute action, as BASE jumping is a kind of parachuting. For the wordplay, HQ is a headquarters, so it gives you BASE, and excited gives you JUMPING, as in a jumpy, animated state. The two pieces are simply stuck together by with.