Crossword Puzzle Mask opening

Clue: Mask opening

Retail store opening? (WAL with 3 letters)
Small opening (e.g. PORE with 4 letters)
Opening numbers? (AREACODES with 9 letters)
Openings to be filled? (CAVITIES with 8 letters)
Milk-lover's letter opening? (DEARDAIRY with 9 letters)
Opening line (DEARSIRS with 8 letters)
Masking, e.g. (TAPE with 4 letters)
Musical work in four parts, with its first part opening the Met's 2010-11 season (RINGCYCLE with 9 letters)
Couch ___ ("The Simpsons" opening bit) (GAG with 3 letters)
Opening of (STARTTO with 7 letters)