... push to western corner (5)

I believe the answer is:

wedge

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But I can't explain it at all! Could you help me understand?

(Other definitions for wedge that I've seen before include "Splitting device" , "Significant amount of money (informal)" , "Tapering block" , "Force (into narrow space); type of golf club" , "Golf club, V-shape" .)

I've seen this clue in The Hindu.

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