More like Manchester, no less like London (7)

I believe the answer is:

greater

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

I cannot understand how the remainder of the clue works.

(Other definitions for greater that I've seen before include "Bigger, larger" , "more powerful" , "Most of it was formerly part of 1 across" , "of more importance" , "More extensive" .)

I've seen this clue in the Evening Standard.

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