Related Clues:

• Mule you've initially found difficult to get hold of
• Difficult to hold
• Wet, slimy; evasive
• Untrustworthy, like a mule?
• Shifty and direly sly piper
• Untrustworthy like a mule?
• and 26: Risky route indicated by poles, maybe?
• Like ice-covered roads
• Awkward to walk on, like a light shoe?
• Like a shoe, perhaps, that's unsafe to walk on
• Czech beer served up for a Yankee -- ice-covered?
• With 68-Across, precarious situations, as suggested by the circled letters
• Evasive; hard to hold
• Footwear next to yard not to be trusted
• Unstable, like some footwear?