Solutions Observant and alert has 20 entries with similar clues
- apbAlert about a flight, maybe
- smogCause for some alerts
- apbsAlerts to escapees, often
- pagerElectronic alerting device
- alertObservant
- awakeAlert
- tip-offAlert
- wakefulAlert and vigilant
- sluggishNot alert
- watchfulObservant
- attentiveObservant
- keen-eyedObservant
- wake-up-toBecome alert to
- sharp-eyedObservant
- on-the-ballAlert
- keepyourwitsbe mentally alert and don't dispense with comics
- on-ones-toesReady and alert
- on-the-lookoutObservant
- planetoftheapes1968 sci-fi movie that (spoiler alert!) is set on earth
- on-the-qui-viveAlert