Fanatic (3-4)
'fanatic' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for extremist that I've seen before include "One with very radical views" , "immoderate person" , "One far from moderate" , "One with views very far from consensus" , "Revolutionary" .)
'fanatic' is the definition.
(both can mean an extremist)
This is all the clue.
(Other definitions for zealot that I've seen before include "Person militant about a cause" , "Fervent enthusiast" , "Fanatic person, much too enthusiastic" , "Fervent advocate" , "Fervent, perhaps militant, proponent" .)
'fanatic' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for fiend that I've seen before include "Evil supernatural being" , "Evil spirit, demon" , "Demon, ogre" , "monster" , "Devilish person" .)
'fanatic' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for devotee that I've seen before include "An enthusiast or a loving follower" , "An enthusiastic admirer and supporter" , "dedicated person" , "Keen admirer" , "A very loyal or loving person" .)
'fanatic' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for die-hard that I've seen before include "Person who is unwilling to change even when there are good reasons to do so" , "Obstinately resistant to change" , "Obstinate or dauntless person" , "Backer of a losing cause" , "Ultra-conservative" .)
'fanatic' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nut that I've seen before include "Hard edible seed" , "Hard-shelled fruit or informal eccentric" , "Bolt securer" , "Bolt counterpart" , "Head (sl.)" .)
'fanatic' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for enthusiast that I've seen before include "one not at all cool" , "buff" , "Devotee" , "Fan" , "One deeply interested in a subject" .)