The most common and most likely answer to this crossword clue is the 6 letter word HURTLE
I've seen this crossword clue in Financial Times
H
U
R
T
L
E
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 HURTLE mean?
HURTLE noun- A fast movement in literal or figurative sense.
- A clattering sound.
- To move rapidly, violently, or without control.
- To meet with violence or shock; to clash; to jostle.
- To make a threatening sound, like the clash of arms; to make a sound as of confused clashing or confusion; to resound.
- To hurl or fling; to throw hard or violently.
- To push; to jostle; to hurl.