The most common and most likely answer to this crossword clue is the 7 letter word THROUGH
I've seen this crossword clue in The Times
T
H
R
O
U
G
H
More clues leading to the result THROUGH
- Dropping ecstasy, bad place to be after driving by
- By way of the short and not so short grass
- Finished, complete, nothing missing
- Finished in bad place after driving, lacking energy
- Having finished boring task?
- Cast, we hear, is finished
- Finished in the endless long grass
- Finished in the short grass off the fairway
- Hard to follow abridged article from beginning to end
- Having finished a boring job?
Buddy explains!

The straight part
We know that "Finished" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case finished = through.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 THROUGH mean?
THROUGH noun- A large slab of stone laid in a dry-stone wall from one side to the other; a perpend.
- Passing from one side of something to the other.
- Finished; complete.
- Without a future; done for.
- No longer interested; wearied or turned off by experience.
- Proceeding from origin to destination without delay due to change of equipment.
- In possession of the ball beyond the last line of defence but not necessarily the goalkeeper; through on goal.
- From one side to the other by way of the interior.
- From one end to the other.
- To the end.
- Completely.
- Out into the open.
- From one side of an opening to the other.
- Entering, then later leaving.
- Surrounded by (while moving).
- By means of.
- In consequence of; as a result of.
- To (or up to) and including, with all intermediate values.
- A coffin, sarcophagus or tomb of stone; a large slab of stone laid on a tomb.