Solutions Referee's instrument ... or an action that may catch your attention has 5 entries with similar clues

• 4-letter words
• snapSynonym for "photograph" ... or a figure that may catch your attention
• umpsBaseball referees
• waveOcean feature ... or a hand action that may catch your attention
• 5-letter words
• flashCamera's burst of light ... or an action that may catch your attention
• shoutBeatles' hit "Twist and ..." ... or an action that may catch your attention