From barn I carried plant (6)
I believe the answer is:
arnica
'plant' is the definition.
(arnica is a kind of plant)
'from barn i carried' is the wordplay.
'from' says the answer is hidden in the clue.
'ARNICA' is hidden within 'barn i carried'.
(Other definitions for arnica that I've seen before include "Herbal ointment used on bruises" , "Tincture for treating bruises" , "Bruise treatment" , "Plant - preparation used for treating bruises" , "Plant preparation to treat bruises" .)