Related Clues:
- Avg. level
- The norm: Abbr.
- Onetime American competitor
- Pt. of MST
- Part of CST: Abbr.
- Kind of deviation, in stats.
- Love bug?
- Customary: Abbr.
- Defunct airline
- Former Disney World official airline
- Erstwhile airline
- Part of EST: Abbr.
- Benchmark, briefly
- Part of PST: Abbr.
- Catch with one's pants down?: Abbr.