The most common and most likely answer to this crossword clue is the 3 plus 4 letter word ONE SHOT
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Buddy explains!
The straight part
We know that "a single attempt" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a single attempt = one shot.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 ONE SHOT mean?
ONE SHOT noun- A television program, film, or comic book that is not part of a series.
- A cinematographic shot of a person talking to camera; a talking head.
- A monostable multivibrator.
- A programmable interval timer.
- Something that occurs only once; a one-off.
- A type of long-lasting paint.
- A music sample that is played without immediate repetition.
- A fanfic of only one chapter.
- A single appearance by a performer.
- A gun that must be reloaded after firing a single shot.
- A product that is sold on its own, rather than as part of a line of products.
- To kill or destroy with a single hit.
- Needing only a single attempt to become effective.
- Unique; occurring only once.
- Performing all the necessary steps on every occurrence, rather than relying on previous setup.
- (research design) Measuring something at a single point in time, with no control group.
- Pertaining to a single shot.