Related Clues:

• Gets in on the game
• Extra insurance covers rolling stock
• What 14-Across does before the game (2 words)
• Works out riddle, having succeeded finally
• Public transport in Elbe coming out of East Berlin
• Pays into the pot
• Glad to leave Stalingrad in coaches
• Amtrak vehicles
• Coaches make exceptional effort, first to last
• Lionel toys
• A lot of rubbish about popular aims
• Gets ready to compete
• Coaches ... or, with 18-Across, station break?
• Chips in some chips
• Pays for a pair, say