Bravo — just dazzling! (6)
I believe the answer is:
bright
'dazzling' is the definition.
(similar in meaning)
'bravo just' is the wordplay.
'bravo' becomes 'b' (phonetic alphabet: alpha, bravo, charlie etc.).
'just' becomes 'right' (similar in meaning).
'b'+'right'='BRIGHT'
(Other definitions for bright that I've seen before include "Intelligent - glaring" , "7 [CLEVER]" , "Clever - dazzling" , "Sparkling" , "Shining; intelligent" .)