The most common and most likely answer to this crossword clue is the 8 letter word FINISHED
I've seen this crossword clue in The Sunday Telegraph
F
I
N
I
S
H
E
D
More clues leading to the result FINISHED
- Angled to include home that’s completed
- Fiendish cryptic, but completed
- Fiendish rogue’s done for
- Female in Slough keeps one wrapped up
- Is he going in to discover it’s all done?
- Complete flipper I get rid of
- Searched around at home, exhausted
- Over bit of fish I cast
- Is he going in to discover it’s all over?
- Heartless Scandinavian journalist is ruined
Buddy explains!

The straight part
We know that "Over" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case over = finished.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 FINISHED mean?
FINISHED verb- To complete (something).
- To apply a treatment to (a surface or similar).
- To change an animal's food supply in the months before it is due for slaughter, with the intention of fattening the animal.
- To come to an end.
- To put an end to; to destroy.
- Processed or perfected.
- Completed; concluded; done.
- Done for; doomed; used up.