Related Clues:
- Underwater vessel, briefly
- Basketball's ''sixth man''
- Classroom replacement
- Underwater craft
- Big sandwich, for short
- One may be needed after a sports injury
- Undersea craft
- Underwater vessel
- Guy on the bench
- Membership fee
- Watership down?
- Captain Nemo's workplace
- Beneath on bus
- Prefix meaning below
- Briefly, membership fee or stand-in