The most common and most likely answer to this crossword clue is the 6 letter word HARASS
I've seen this crossword clue in The Guardian
H
A
R
A
S
S
More clues leading to the result HARASS
- Mostly difficult idiot making trouble
- Hard as nails, having to eject Duke and arrest Harry
- Badger has to eat tops of radishes and swedes
- Badger about to leave African capital by ship
- Torment two animals, the first tailless
- Endlessly difficult donkey creating trouble
- Pester and almost hurt fool
- Badger to maul tailless equine
- Badger, timid mammal almost when close to humans
- Isaac’s mum turned up on Sunday to be troublesome
Buddy explains!

The straight part
We know that "Badger" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case badger = harass.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 HARASS mean?
HARASS noun- Devastation; waste
- Worry; harassment
- To fatigue or to tire with repeated and exhausting efforts.
- To annoy endlessly or systematically; to molest.
- To put excessive burdens upon; to subject to anxieties.