---

All answers having "Foul ___" as clue:

3 Character Answers:

---

DEN

TIP



4 Character Answers:

---

DACE

EVIL

FOLK

GAME

ICKY

RANK

STAY

TIPS

VILE



5 Character Answers:

---

AWFUL

DIRTY

NASTY

SLIMY

YUCKY



6 Character Answers:

---

IMPURE

NOFAIR

PUTRID

SMELLY



7 Character Answers:

---

NOISOME

NOTFAIR

POLLUTE

UNCLEAN



8 Character Answers:

---

HOMICIDE



9 Character Answers:

---

RACINGCAR



10 Character Answers:

---

ABOMINABLE