Wife of performer with opening feature that's amazing (3,6)

'feature that's amazing' is the definition.
(something that has the wow factor is amazing)

'wife of performer with opening' is the wordplay.
'wife' becomes 'w' (abbreviation).
'performer' becomes 'actor' (actor is a kind of performer).
'with' becomes 'w' (abbreviation).
'opening' is an insertion indicator (some letters open a gap in others).
'of'+'actor'='ofactor'
'ofactor' enclosing 'w' is 'owfactor'.
'w'+'owfactor'='WOW FACTOR'