Related Clues:

• Quality of uniformity
• Smoothness
• Uniformity
• Asymmetry, as in a relationship
• There's nothing odd about seven ENs
• Is this the result of a plane having passed over?
• What the plane leaves behind it
• Stable quality yet to come to a head
• All the same, the head makes a regular appearance
• Calm quality a particular loch unexpectedly displayed
• Smooth quality
• Finish off match, maybe, with point for consistency
• The day before end of inspection, head's calm
• Consistency
• Levelness