Noted evangelist in plant (8)
I believe the answer is:
remarked
'noted' is the definition.
('remark' can be a synonym of 'note')
'evangelist in plant' is the wordplay.
'evangelist' becomes 'Mark' (traditional author of the Gospel of Mark).
'in' indicates putting letters inside.
'plant' becomes 'reed' (reed is a kind of plant).
'mark' placed into 'reed' is 'REMARKED'.
(Other definitions for remarked that I've seen before include "Commented, made observation" , "Observed, mentioned" , "Made written or spoken comment" , "Made comment or observation" , "looked at exam papers again" .)