Related Clues:

• Sport in Six Nations finally showing destructive influence
• Software defect
• Collapse from exhaustion, say
• Firefly, for example
• Cold? Not advisable to fall asleep
• Irish American crushed by very nasty bug
• Cricket or grasshopper
• Fisher's lure
• Wriggly invertebrate
• Submicroscopic pathogen
• Lycra's hope to contain collapse
• Garden invertebrate
• Wretched person without room
• Wriggler for a robin
• Computer hard drive headache