Related Clues:

• Flow gradually through cracks
• What gives?
• Slimy goo
• Barely run
• On the outskirts of Lake Geneva with hot stuff running down the hill
• Move like slime
• Thin flow
• River-bed mud; leak slowly
• What volcano ejects
• Come out slowly, rather inclined to lose time
• It flows from volcano
• Stuff heatedly hurled out, as politician's left little room
• Try to catch trout round river, a sluggish stream
• To ooze
• Slimy mud in one of three English rivers, say