Not so far from Cork? (6)

I believe the answer is:

closer

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'not so far' is the definition.
('close' can be the opposite of 'far' so perhaps 'closer' is reasonable for 'not so far')

I can't explain the remainder of the clue.

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(Other definitions for closer that I've seen before include "within a shorter distance" , "Nearer or more intimate" , "More near or imminent" , "Comparatively near" , "Less distant" .)

I've seen this clue in The Independent.

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