Farm implement (6)
![Ross](/clue/static/ross-mug.min.png)
'farm implement' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for harrow that I've seen before include "Equipment provided for ground-breaking" , "Torment (at public school?)" , "and another [SCHOO]" , "Soil cultivator - English public school" , "It breaks up clods and covers seeds" .)