Be right about Oscar’s puzzle? (8)
I believe the answer is:
bewilder
'puzzle?' is the definition.
(I know that amaze can be written as bewilder)
'be right about oscar's' is the wordplay.
'right' becomes 'r' (common abbreviation).
'about' is a charade indicator (letters next to each other).
'oscar' becomes 'wilde'.
'r' put after 'wilde' is 'wilder'.
'be'+'wilder'='BEWILDER'
(Other definitions for bewilder that I've seen before include "Confuse totally" , "fox" , "Baffle" , "Wild beer tending to confuse" , "Flummox, confuse" .)