Go to part of Islington, where most people are Irish (5)

I believe the answer is:

sligo

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'where most people are irish' is the definition.
The definition suggests a singular noun which matches the answer.

'go to part of islington' is the wordplay.
I cannot quite see how this works, but
'go' is present in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for sligo that I've seen before include "Ir. town by Donegal bay" , "County of NW Eire" , "Irish seaport and county" , "part of Ireland" , "Yeat's county" .)

I've seen this clue in the Evening Standard.

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