Hawk — jump jet (7)
I believe the answer is:
harrier
I believe this is a double definition.
'hawk' is the first definition.
(I know that harrier is a type of hawk)
'jump jet' is the second definition.
(I've seen this before)
(Other definitions for harrier that I've seen before include "may get on your back?" , "that flies!" , "jump jet" , "Hare hound" , "Cross-country runner and a hound once used for hunting hares" .)