The most common and most likely answer to this crossword clue is the 6 letter word DARKLY which also is the latest solution we found used in Newsday in 2005.
In a sinister manner crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| DARKLY | 100 % | 6 | 
Words with a meaning similar to the clue: In a sinister manner
These words may or may not be a possible solution to this crosswords clue.- sinisterly
 - fiendish
 - ominously
 - black
 - evil
 - grim
 - grimly
 - ill
 - intrigue
 - scheme
 - darkly
 - forbidding
 
Crossword Answer definitions
DARKLY adverb- With a dark appearance.
 - Faintly seen in the dark.
 - In a morbid manner; morbidly, sinisterly.
 - Mysteriously; forebodingly, ominously.
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution