The most common and most likely answer to this crossword clue is the 7 letter word UNCLEAN
U
N
C
L
E
A
N
More clues leading to the result UNCLEAN
- Sort of broker with an evil appearance
- Filthy relative, man short of capital
- Most of vague sermon ultimately not suitable for ceremony
- Relative before being grubby
- Morally impure relative Jane undressed
- Relative ambition that’s heartless and immoral
- Pawnbroker fleeced many? That’s morally wrong
- Foul clue Ann solved
- Relation with a name for being filthy
- Aunt regularly pursuing her husband, in need of wash
Buddy explains!

The straight part
We know that "Foul" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case foul = unclean.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 UNCLEAN mean?
UNCLEAN adjective- Dirty, soiled or foul.
- Not moral or chaste.
- Ritually or ceremonially impure or unfit.