Over there in the back of beyond (3)

I believe the answer is:
yon
'over there' is the definition.
(archaic word meaning 'over there')
'the back of beyond' is the wordplay.
'YON' is hidden in amongst the letters.
But, I am unsure how this is indicated.
'in' is the link.
Can you help me to learn more?
(Another definition for yon that I've seen is " Those Scots".)
I've seen this clue in the Evening Standard.
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