The most common and most likely answer to this crossword clue is the 6 letter word HARROW
I've seen this crossword clue in The Daily Telegraph
H
A
R
R
O
W
More clues leading to the result HARROW
- Curtailed complex argument in school
- Public school, distress!
- Public school distress
- Where Winston Churchill was taught to break up ploughed land
- Where to learn to move the earth?
- Agricultural tool with hard shaft
- School torment
- Hospital appears on direction indicator in London
- Husband with pointer to use agricultural tool
- Plough – heaven’s first pointer
Buddy explains!

The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does HARROW mean?
HARROW noun- A device consisting of a heavy framework having several disks or teeth in a row, which is dragged across ploughed land to smooth or break up the soil, to remove weeds or cover seeds; a harrow plow.
- An obstacle formed by turning an ordinary harrow upside down, the frame being buried.
- To drag a harrow over; to break up with a harrow.
- To traumatize or disturb; to frighten or torment.
- To break or tear, as if with a harrow; to wound; to lacerate; to torment or distress; to vex.
- A call for help, or of distress, alarm etc.