Ornamental plant bed mostly eaten by injured raven (7)
I believe the answer is:
verbena
'ornamental plant' is the definition.
(I've seen this before)
'bed mostly eaten by injured raven' is the wordplay.
'mostly' means to remove the last letter.
'eaten by' indicates putting letters inside.
'injured' is an anagram indicator.
'bed' with its last letter taken off is 'be'.
'raven' anagrammed gives 'verna'.
'be' inserted within 'verna' is 'VERBENA'.
(Other definitions for verbena that I've seen before include "Herbaceous plant" , "Vervain (plant)" , "Ornamental pant" , "Ornamental plant with showy flowers" , "Garden plant" .)