The most common and most likely answer to this crossword clue is the 6 letter word MISSED
I've seen this crossword clue in The Daily Telegraph
M
I
S
S
E
D
More clues leading to the result MISSED
- Edition by school ma’am left out
- Failed to find sea surrounding island close to Rhodes
- Avoided fog by the sound of it
- Didn’t run into so-called vapour cloud
- Heartlessly ill-treated but failed to notice
- Sound of film came too late
- Reportedly, film wasn't a hit
- Did not see but heard spray
- Failed to become veiled in speech
- Failed to hear sound of film
Buddy explains!

The straight part
We know that "Failed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case failed = missed.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 MISSED mean?
MISSED verb- To fail to hit.
- To fail to achieve or attain.
- To avoid; to escape.
- To become aware of the loss or absence of; to feel the want or need of, sometimes with regret.
- To fail to understand; to have a shortcoming of perception; overlook.
- To fail to attend.
- To be late for something (a means of transportation, a deadline, etc.).
- To be wanting; to lack something that should be present.
- (said of a card) To fail to help the hand of a player.
- To fail to score (a goal).
- To go wrong; to err.
- To be absent, deficient, or wanting.