Clue: Opening of a sewage-filled pool?

Answer: CESS

Length: 4

---

Similar Clues:

• Activity-filled (ABUZZ with 5 letters)
• Filled with ardor (AFIRE with 5 letters)
• Filled with apprehension (AFRAID with 6 letters)
• American opening (AFRO with 4 letters)
• Arafat's opening? (Var.) (ALEF with 4 letters)
• Abba's opening (ALEF with 4 letters)
• Part of a filled-out survey: Abbr. (ANS with 3 letters)
• Opening amount (ANTE with 4 letters)
• "Aeneid" opening (ARMA with 4 letters)
• Make an opening offer? (ASKIN with 5 letters)