Possible Clues:

• Bass - is a type of fish to go with top fizz in Wicklow?
• It's comes from the horse's mouth - top teacher is in Wicklow
• Brother says yes to chieftain on top in Wicklow
• Does this mean on top of being an ass in Wicklow?
• Is that what the donkey has on top in Wicklow?
• A donkey might be said to have one in Wicklow
• In Wicklow on a donkey
• What the moke may have to have near Dublin?
• What the donkey has in common with Wicklow