Related Clues:

• Strike-breaker showing evidence of a scuffle?
• It may cover a sore spot
• Splice
• Make one of many
• Britain's largest trade union
• Wound's protective cover
• Untie tricky knot
• Join the fifth division?
• Protective wound cover
• Fill-in for a striker
• Persona non grata, to a striker
• It forms over a healing abrasion
• Join forces with idiot stopping rise of European Union
• Wound protection
• Join upper-class twit going to top of Everest