The most common and most likely answer to this crossword clue is the 6 letter word MISLAY
I've seen this crossword clue in The Daily Telegraph
M
I
S
L
A
Y
More clues leading to the result MISLAY
- Be unable to find Scottish island on map at first
- Lose in place covered with endless thin fog
- He directs agents to lose
- Fail to find motorway covering Scottish island
- Lose a lot of faith with many heartless around
- Lose track of dispatch on motorway
- Lose roadkill seen in two parts
- Lose bet, after card is turned over
- Lose minutes approaching Hebridean island
Buddy explains!

The straight part
We know that "Fail to find" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fail to find = mislay.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 MISLAY mean?
MISLAY verb- To leave or lay something in the wrong place and then forget where one put it.