Saucy county? (4)
I believe the answer is:
mayo
'county?' is the definition.
(county of Ireland)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for mayo that I've seen before include "part of Ireland" , "Irish county (county town, Castlebar)" , "Salad dressing (informal)" , "You'll find it in the Emerald Isle" , "Ir. county; salad dressing" .)