Related Clues:

• Sound before 3 Down, maybe
• Soft attention-getter
• A line of clothing that's said to attract attention
• "Attention, please!"
• Attempt to attract attention from ship's staff
• Cutting-in word
• Informal interrupter
• Listen, there's more to say, by the way
• A word in your ear: civilian vessel's engaged in exercises
• Er, I say, one is on edge
• Final note way over here!
• I forgot to mention at the start, so try and pay attention!
• Whispered attention grabber
• Hark
• Secret-telling preceder