Possible Clues:

• From 17 across there's a groan about the East
• Grand monarch follows riding a donkey
• Just a time to start to be a wild sort of an ass
• That ass is wild enough to start to be on time
• Wild equine of Asia
• It makes Ron be such an ass to get around 27 across
• Some people put on a gerrymandering ass
• Right on time? No! Later, you ass!
• An ass over gear-changing
• Ancient catapult