Where to make one's fortune immediately? (7)

I believe the answer is:

lucknow

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'where to make one's' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'fortune immediately?' is the wordplay.
'fortune' becomes 'luck' (synonyms).
'immediately?' becomes 'now' (I've seen this in other clues).
'luck'+'now'='LUCKNOW'

Can you help me to learn more?

(Other definitions for lucknow that I've seen before include "great relief" , "Indian city, capital of Uttar Pradesh" , "having trouble in eighteen fifty seven" , "Indian metropolis" .)

I've seen this clue in the Evening Standard.

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