Notice ring — right on a married woman (7)
I believe the answer is:
signora
'married woman' is the definition.
(Italian equivalent to 'missus')
'notice ring right on a' is the wordplay.
'notice' becomes 'sign' (I've seen this before).
'ring' becomes 'O' (letter resembling a ring).
'right' becomes 'r' (abbreviation).
'on' is a charade indicator (letters next to each other).
'sign'+'o'+'r'+'a'='SIGNORA'
(Other definitions for signora that I've seen before include "European lady" , "married woman in Florence?" , "Foreign woman" , "to Italy, madam" , "Mrs (Ital.)" .)