Related Clues:

• Perhaps they get the sound of the north as it approaches
• How the North gets close to getting them on ahead
• The North gets close to getting sound with them
• Following the North they go on ahead, or something approaching that
• As one gets to the North, get it by the sound of it
• Nitrogen helps them to get on ahead
• Gets hard by this
• Gets this more of a close-up
• How one approaches the sound organs of the North
• Gets in the vicinity of
• The North listens to them, or gets close to it
• Does not get away with it
• Comes into view for 19 across
• Comes closer to
• Leaders of naval expeditions always raid southern approaches