Remove stunted vegetation (5)
I believe the answer is:
scrub
I believe this is a double definition.
'remove' is the first definition.
(scrub can mean to remove or delete)
'stunted vegetation' is the second definition.
(undergrowth or stunted forest growth)
(Other definitions for scrub that I've seen before include "Cancel (informal)" , "poor growth" , "Stunted growth" , "Wash the stunted shrub?" , "Rub hard with a brush" .)