Possible Clues:

• Passing test, ran in drunk!
• Passing time, one in performed broadcast
• Brief article is thrown back into river
• Passing rogue in tent's mobbing artist
• Nomad's tent invaded by torrential rains
• Passing trains, ten diverted
• Short series broadcast one put off
• Lasting only a short time
• Short-termer that's escaped is put back under canvas
• New entrant is fly-by-night