Possible Clues:

• It all goes to show how he will use the phone after us
• It all goes to show it's us he may phone to
• Making use of the lady in putting one in one's place
• All goes to show it's us he may telephone to
• It's all going to show how to gush about Ireland
• Showing us where he will use the phone
• Working as escort
• Acting as guide for us, the fellow leading band
• Groomsman's task
• Escorting female into upper-class circle