A couple of chaps somewhere in Essex (8)

I believe the answer is:

basildon

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'essex' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for basildon that I've seen before include "S East town" , "Essex new town" .)

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