The most common and most likely answer to this crossword clue is the 4 letter word OMIT
I've seen this crossword clue in The Daily Telegraph
O
M
I
T
More clues leading to the result OMIT
- Skip round little boy, jumping up
- Miss or Mrs, initially the other
- Skip — nothing massive initially to put on it
- Books containing note found in skip
- Do not include it with order
- Miss Shakespearean title role -— endlessly upset
- Skip university in pursuit of love
- ‘Five Go Off To Be Sick’? Leave it out!
- Miss sick? Not very
- Miss nothing, having joined American university
Buddy explains!
The straight part
We know that "Fail" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fail = omit.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 OMIT mean?
OMIT verb- To leave out or exclude.
- To fail to perform.
- To neglect or take no notice of.