Related Clues:
- Keeping a good watch
- Sharp beer resident emptied
- 'Red ___!' (cry on the Enterprise)
- Caffeinated, perhaps
- Warn of 62 Across
- Signal from squealer transmitted
- Signal from whaler transmitted
- Relents as travelling in vigilant state
- Wakeful characteristic
- Keeping an eye open for a typically drunk retweet
- Keeping an eye peeled
- Having perked-up ears
- You might issue one for spoilers
- Well-caffeinated, maybe
- Attentive dealer taking part