Possible Clues:

• Sat upon (anag)
• Dismissed, sleeps over in S African grazing area
• Away for duration of orange boycott?
• Unyoke oxen (from a cart)
• Resting place for trekkers (and their oxen!)
• Wrong term for South African stopping place
• Puts a no to get out of harness for the team
• South African traveller's rest - unyoke horses
• A sop to Aunt, and a place for the rest in South Africa
• Unharness(ing) after trek