Crossword Puzzle Inside opening

Clue: Inside opening

Inside opening? (ENTO with 4 letters)
Inside flight (STAIRS with 6 letters)
Analyst with Barkley on "Inside the NBA" (ONEAL with 5 letters)
Source of inside info? (e.g. CATSCAN with 7 letters)
Certain opening (TSLOT with 5 letters)
Fence's opening, perhaps (PSST with 4 letters)
Opening for outside? (ECTO with 4 letters)
DC insider (POL with 3 letters)
Verb in the classic "Mission: Impossible" opening scene (DISAVOW with 7 letters)
Field opening (GATE with 4 letters)