Mean, twisted individual in plant (7)
I believe the answer is:
anemone
'plant' is the definition.
(anemone is a kind of plant)
'mean twisted individual' is the wordplay.
'twisted' indicates anagramming the letters.
'individual' becomes 'one' (an individual is one person).
'mean' with letters rearranged gives 'anem'.
'anem'+'one'='ANEMONE'
'in' acts as a link.
(Other definitions for anemone that I've seen before include "Growth" , "Woodland plant - name one (anag)" , "Flowering plant - mean one (anag)" , "The flower is no enema" , "Plant with bright flowers" .)