Possible Clues:

• Problem solving
• What a jittery camera operator may be having?
• Has difficulty firing when detecting and solving problems
• Problem-solving husband with foreign coins in London area
• Sorting out business? Money hard to find in part of south London
• In London district, foreign cash goes on drug providing a fix
• Tracing and correcting faults
• Wounded marksman may have this process to resolve problem
• Bothers using the horn in sorting out problem
• Problems sounding horn get expert diagnosis and repair