Related Clues:

• Steaming stream
• Get through the cracks
• Primordial slime
• What 35-Down may do
• Move like glue
• Creep like lava
• Exhibit, as with smarminess
• Flow slow
• It's red-hot
• Move like ketchup
• Etna's outpouring
• Volcanic overflow
• Barely get through
• Escape, as through a crevice
• Etna issuance