The most common and most likely answer to this crossword clue is the 4 letter word SOOT which also is the latest solution we found used in Universal uClick in 2007.
Flue substance crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| SOOT | 100 % | 4 | 
Words with a meaning similar to the clue: Flue substance
These words may or may not be a possible solution to this crosswords clue.- soot
 - ash
 - funnel
 - draw
 - smut
 - fluff
 - apc
 - chimney
 - fireplace
 - flute
 - glute
 - pipe
 
Crossword Answer definitions
SOOT noun- Fine black or dull brown particles of amorphous carbon and tar, produced by the incomplete combustion of coal, oil etc.
 
- To cover or dress with soot.
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution