Contemplate making Yankee start over there (6)

I believe the answer is:

yonder

'over there' is the definition.
(archaic preposition meaning 'over there')

I cannot understand how the rest of the clue works.

(Other definitions for yonder that I've seen before include "Over there, a long time ago" , "Over there (poetic)" , "to place indicated" , "In that direction" , "At a distance but in sight" .)

I've seen this clue in The Guardian.

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