School which deals firmly with clods? (6)
I believe the answer is:
harrow
'school' is the definition.
(famous UK public school)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for harrow that I've seen before include "Soil cultivator - English public school" , "Equipment used in ground-breaking" , "Soil-breaker; school" , "Clod breaker" , "Break new ground" .)