The most common and most likely answer to this crossword clue is the 6 letter word CEASED
I've seen this crossword clue in The Sunday Telegraph
C
E
A
S
E
D
More clues leading to the result CEASED
- Stopped to relax in the outskirts of Chelmsford
- Stopped being quiet to break record
- Bit of advice, as editor gave up
- Cold became less severe and stopped
- A number relaxed and stopped
- Stopped dance, as Eddie Cochran appeared
- Stopped and took a good look round, saving energy
- Stopped and inspected, inserting key
- Reached finish with no difficulty, breaking record
- Stopped being cold, and slowed down
Buddy explains!

The straight part
We know that "Reached finish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case reached finish = ceased.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 CEASED mean?
CEASED verb- To stop.
- To stop doing (something).
- To be wanting; to fail; to pass away.