shoot upward (6)
I believe the answer is:
rocket
'shoot upward' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rocket that I've seen before include "Firework and lettuce" , "Salad vegetable" , "Projectile; salad plant" , "Salad leaves - move at great speed" , "Salad plant; strong reprimand" .)