Crossword Genius

In a west London town, I make a case (6)

Ross

I believe the answer is:

action

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'a case' is the definition.
(both refer to legal proceedings)

'in a west london town i' is the wordplay.
'in' indicates putting letters inside.
'west london' becomes 'con' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'town' becomes 't' (abbreviation for town).
'a'+'con'='acon'
't'+'i'='ti'
'acon' placed around 'ti' is 'ACTION'.

'make' is the link.

Can you help me to learn more?

(Other definitions for action that I've seen before include "Battle - suit" , "SECOND PART OF 15" , "Take proceedings" , "claim in court" , "Military engagement" .)

I've seen this clue in the Evening Standard.
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