French city spoils Parisian female, one trapped (9)

I believe the answer is:

marseille

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'french city' is the definition.
(I've seen this before)

'spoils parisian female one trapped' is the wordplay.
'spoils' becomes 'mars' ('mar' can be a synonym of 'spoil').
'parisian female' becomes 'elle' (I can't explain this - if you can you should give a lot more credence to this answer).
'one' becomes 'I' (Roman numeral).
'trapped' indicates putting letters inside.
'elle' placed around 'i' is 'eille'.
'mars'+'eille'='MARSEILLE'

Can you help me to learn more?

(Other definitions for marseille that I've seen before include "Port city of France" , "fabric" , "Major seaport of Southern France" , "French city" , "French port" .)

I've seen this clue in The Times.

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