The most common and most likely answer to this crossword clue is the 7 letter word OMINOUS
I've seen this crossword clue in The Daily Telegraph
O
M
I
N
O
U
S
More clues leading to the result OMINOUS
- Odd form of compulsion finds this minatory PLC fazed
- Forbidding old, less inspiring love
- Ring operator, ringing round and hinting at trouble
- Extremely worrying when some fine house gets stripped
- Threatening palomino usually keeps it captive
- Old negative quality about love is generating unease
- Our startercontains nothing sinister
- One appears in New Moon and Love the Land of Trump – sinister
- Sinister old male, one we heard in Paris
- Threatening ring with MI intelligence
Buddy explains!
The straight part
We know that "is threatening" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case is threatening = ominous.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 OMINOUS mean?
OMINOUS adjective- Of or pertaining to an omen or to omens; being or exhibiting an omen; significant.
- Specifically, giving indication of a coming ill; being an evil omen