Puzzle (3)

'puzzle' is the definition.
(I know that puzzle can be written as vex)
This is the entire clue.
(Other definitions for vex that I've seen before include "upset" , "Irritate, annoy" , "Irk" .)
'puzzle' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for poser that I've seen before include "This person's affected" , "difficult puzzle" , "Puzzling question for the model" , "Problem set by the model" , "Exhibitionist" .)
'puzzle' is the definition.
(I know this)
This is the entire clue.
(Other definitions for stump that I've seen before include "Projecting remnant" , "Wicket upright; greatly puzzle" , "Flummox" , "Floor" , "Residue after felling" .)
(Other definitions for mystery that I've seen before include "It can't be explained" , "Something that passes understanding" , "Type of play" , "tale of suspense" , "Unexplained happening" .)
'puzzle' is the definition.
(I know that puzzle can be written as perplex)
This is all the clue.
(Other definitions for perplex that I've seen before include "Make (someone) baffled" , "Mystify" , "Baffle, flummox" , "Dumbfound" , "Bewilder" .)
'puzzle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for enigma that I've seen before include "Mysterious or puzzling thing" , "Elgar Variations nickname" , "Riddle - German coding machine" , "Difficult problem" , "Mystery U puzzle" .)
'puzzle' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bemuse that I've seen before include "Bewilder or baffle" , "Confuse, bewilder" , "Fox" , "Perplex" , "Puzzle, make confused" .)
'puzzle' is the definition.
(a riddle is a puzzle or problem)
This is all the clue.
(Other definitions for riddle that I've seen before include "Perforate with gunshot - poser" , "Screen" , "Make many openings" , "Ingenious question" , "Sieve; enigma" .)
'puzzle' is the definition.
(a conundrum is a puzzle or mystery)
This is the entire clue.
(Other definitions for conundrum that I've seen before include "Puzzle, riddle" , "anagram" , "Puzzling problem" , "Poser" , "Difficult problem" .)
'puzzle' is the definition.
(type of puzzle)
This is the entire clue.
(Other definitions for crossword that I've seen before include "that should make you think" , "Letter puzzle" , "See 8, 20 ac, 1, 15 dn" , "Cruciverbal test" , "One of these, first published December 1913 ..." .)
'puzzle' is the definition.
(I know that puzzle can be written as bewilder)
This is all the clue.
(Other definitions for bewilder that I've seen before include "Nonplus" , "Confuse - perplex" , "fox" , "Wild beer tending to confuse" , "Flummox, confuse" .)