The most common and most likely answer to this crossword clue is the 8 letter word JEOPARDY
I've seen this crossword clue in The Daily Telegraph
J
E
O
P
A
R
D
Y
More clues leading to the result JEOPARDY
- Risk heading off big cat in jungly banks
- Peril American writer recalled in shock — diary's contents erased
- Danger across the Channel, I send up love first
- Risk finding padre cavorting with Joy
- In Paris I work on a ruddy odd quiz show
- Jo prayed about hazard
- Joy read novel about protagonist initially in danger
- Padre, with joy, reformed menace
- Retired medic, a writer, wearing jacket in January in danger
- Cat left out in front of joiner’s yard is a risk
Buddy explains!

The straight part
We know that "menace" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case menace = jeopardy.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 JEOPARDY mean?
JEOPARDY noun- Danger of loss, harm, or failure.
- To jeopardize; to endanger.