Support no old city with one shilling (7)

I believe the answer is:

nourish

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

'no old city with one shilling' is the wordplay.
'old city' becomes 'ur' (ancient city state).
'with one shilling' becomes 'ish' (I can't explain this - if you can you should believe this answer much more).
'no'+'ur'+'ish'='NOURISH'

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(Other definitions for nourish that I've seen before include "Nurture, sustain" , "Keep alive and well with food" , "Feed, sustain" , "[OPPOSITE OF] starve" , "Foster or cherish, often with food" .)

I've seen this clue in the Sydney Morning Herald.

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