Possible Clues:

• Jazz hands, e.g
• Word after 'grand' or 'hand'
• Sign of trail-bike ruts Egyptologist's covered over
• Signal gets half-confused on river
• Motion to express something
• Signal from visitor dropping union leader on river
• Thumbs-up, e.g
• Guest confused about hand signal
• Fist pump or high-five, e.g
• Message through movement