Possible Clues:

• 'What, me ___?'
• Sardonic about army men causing trouble
• Distress
• (Feel) anxiety
• Hassle old bishop in Wyoming
• Line back on railway causes anxiety
• Railway line doubles back at first, causing concern
• Lose sleep over (with "about")
• 'Interest paid on trouble before it falls due,' per W. R. Inge
• Argument over railway concern