Related Clues:

• It's hardly prudent to close 15 across
• It's reckless digging up contents of Sharm El-Sheikh Sarcophagi
• What might jumping into nettles be — and cause?
• Much in little time
• Spots, perhaps
• Poison ivy eruption
• Not well thought through
• Like a hasty decision
• Headstrong, like horse at end of run
• Like decisions made on a dare, typically
• Over-hasty artist — say no more!
• Overly impulsive
• Break out? That would be unwise
• Perhaps spots rook on tree
• Itchy allergic reaction