Crossword Genius

For a month, she has a first class return (5)

Ross

I believe the answer is:

maria

I'm a little stuck... Click here to teach me more about this clue!

'for' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see an association between them that I can't see?

'a month she has a first class return' is the wordplay.
'a month' becomes 'M' (standard abbreviation).
'she' becomes 'ra' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'has' says to put letters next to each other.
'a first class' becomes 'ai' (Ar - top quality).
'return' says the letters should be written in reverse.
'ra' put after 'ai' is 'aira'.
'aira' backwards is 'aria'.
'm'+'aria'='MARIA'

Can you help me to learn more?

(Other definitions for maria that I've seen before include "Ms Callas, soprano" , "Black --, police van" , "- Callas, twentieth century opera singer" , "More than one plain" , "one from West Side Story" .)

I've seen this clue in the Evening Standard.
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