Possible Clues:

• Coaches coaches
• They have a track record perhaps with coaches
• They're on track
• Schools transport
• Public transport in Elbe coming out of East Berlin
• Glad to leave Stalingrad in coaches
• Pieces of cloth trailing from the backs of gowns
• Engineers' concerns
• This is how one gets fit to play when it's wet after tea
• The coach works where there are coaches