Follower, revolutionary in Vietnam's eyes (3-3)
I believe the answer is:
yes man
'follower' is the definition.
(yes-man is a kind of follower)
'revolutionary in vietnam's eyes' is the subsidiary indication.
'revolutionary' says the letters should be written backwards.
'in' indicates the answer is hidden within the clue.
'namsey' is hidden within 'vietnams eyes'.
'namsey' reversed gives 'yesman'.
(Other definitions for yes man that I've seen before include "Obsequious male who always agrees with the boss" , "I'd always agree" , "An agreeable sycophant?" , "A male sycophant" , "Flunkey" .)