A border or two in the East End? (4)

I believe the answer is:

edge

I'm a little stuck... Click here to teach me more about this clue!

This clue could be a double definition.

'a border' is the first definition.
('edge' can be a synonym of 'border')

'two in the east end?' is the second definition.
'edge' can be an answer for 'end?' (thesaurus). I'm unsure of the 'two in the east' bit.

'or' acts as a link.

Can you help me to learn more?

(Other definitions for edge that I've seen before include "Margin, extremity" , "The part farthest from the middle" , "Skirt" , "Outer limit" , "Brim" .)

I've seen this clue in The Everyman puzzle in The Observer.

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