Has it a cultivating effect in the field of education? (6)
I believe the answer is:
harrow
'field of education?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for harrow that I've seen before include "Soil cultivator - English public school" , "Spiked frame for breaking and levelling soil" , "Equipment provided for ground-breaking" , "Plough, school" , "Distress greatly - public school" .)