Related Clues:
- Hospital delivery
- Training-pants wearer
- Elmo fan, maybe
- 'Sesame Street' viewer
- Little crawler
- Buggy occupant
- Pampers wearer
- Juvenile
- Toy boat pusher
- Word before the starts of 16-, 36- and 58-Across and 10-, 14- and 33-Down
- Pre-schooler
- Stroller passenger
- Treat with kid gloves
- Onesie wearer
- Relatively recent arrival?