Name revolutionary individual in plant (7)
I believe the answer is:
anemone
'plant' is the definition.
(anemone is a kind of plant)
'name revolutionary individual' is the wordplay.
'revolutionary' indicates anagramming the letters.
'individual' becomes 'one' (an individual is one person).
'name' is an anagram of 'anem'.
'anem'+'one'='ANEMONE'
'in' acts as a link.
(Other definitions for anemone that I've seen before include "Bright flower or sea plant" , "Name one strange flower" , "bloomer" , "Flower related to the buttercup" , "Woodland plant - marine polyps" .)