Related Clues:

• Like mud
• Leaking
• Slimy
• Like molasses
• Tending to leak slowly
• Seeping
• Leaking goop
• Leaking slowly
• Like slime
• Semi-solid, and a homonym of 26-Down
• Like wetlands
• Like sap
• Like mud between one's toes, say
• Tending to seep slowly
• Offering uncertain footing