Ammo is transported from plant (6)
I believe the answer is:
mimosa
'plant' is the definition.
(mimosa is a kind of plant)
'ammo is transported' is the wordplay.
'transported' indicates an anagram.
'ammo'+'is'='ammois'
'ammois' anagrammed gives 'MIMOSA'.
'from' is the link.
(Other definitions for mimosa that I've seen before include "Variety of acacia" , "Tropical tree with yellow flowers" , "One growing sensitive" , "Tropical shrub with yellow flowers" , "Shrub - I'm Amos (anag)" .)