A foreign girl who drops in after marriage (9)
I believe the answer is:
signorina
'a foreign girl' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'drops in after marriage' is the wordplay.
I cannot quite understand how this works, but
'in' is within the answer.
The remaining letters 'signora' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'who' acts as a link.
Can you help me to learn more?
(Other definitions for signorina that I've seen before include "Miss Italy?" , "Italian girl revealed" , "Foreign miss" , "Italian equivalent of "mademoiselle"" , "Italian miss" .)