Possible Clues:

• Informal language is about to be used in communications
• They work on the railway to get gin into the lass
• Gestures to start to put your name to them
• Breaking glass in indicators
• Semaphore user's output
• Indicates informal speech is being written up
• They may get mixed in communication
• were ___ that Dana was smitten, too
• Without speaking, communicates: 'Exceptional spades'
• Communications jargon is making a comeback