Possible Clues:

• Michael Nesmith provided a loose one
• Hail with a gesture
• Hail respectfully
• Greet with a sign
• Greet the South with 16 acrosses attached
• Bring hand smartly to cap
• One will get it in the army with strings attached at last
• Raise your hand and cut off the top for there to be strings attached
• Acknowledge (superior)
• Greet(ing)