Related Clues:

• Liable to change unpredictably
• Liable to lead to sudden change
• Moving unpredictably like the salvage collectors?
• Not even little by little, a traitor infiltrated
• Likely to blow up rodent about to turn tail
• Capricious boy about to betray one's trust
• Wayward vermin found in Morecambe?
• Wayward boy squashing vermin
• Idle, broken by desert, becomes unstable
• Irregular - eccentric
• Unsteady on the feet
• Unstable (like North American mountains?)
• Irregular and unreliable
• Unstable - tantrum
• Hard - unstable