Angrier after extremely bizarre puzzle (8)
I believe the answer is:
bewilder
'puzzle' is the definition.
('bewilder' can be a synonym of 'puzzle')
'angrier after extremely bizarre' is the wordplay.
'angrier' becomes 'wilder' ('wild' can be a synonym of 'angry').
'after' is a charade indicator (letters next to each other).
'extremely' says to hollow out the word (remove centre letters).
'bizarre' with its centre removed is 'be'.
'wilder' after 'be' is 'BEWILDER'.
(Other definitions for bewilder that I've seen before include "Deli brew (anag.)" , "Confuse - perplex" , "Confuse utterly" , "Confuse totally" , "Perplex the wild beer" .)