Crossword Puzzle Diplomatic office

Clue: Diplomatic office

Diplomatic officer (e.g. ATTACHE with 7 letters)
Certain Navy officer (ENSIGN with 6 letters)
Form for movers, at the post office (COA-117 with 7 letters)
Three nos. in the office (EXT with 3 letters)
Discovery named for James Cook's superior officer (SANDWICHISLANDS with 15 letters)
Office chair problem, perhaps (SQUEAK with 6 letters)
Remove old-time shoemaker from office? (IMPEACHCOBBLER with 14 letters)
Office mail labels (INS with 3 letters)
L.A.P.D. officer (SGT with 3 letters)
Spin, as an office chair (SWIVEL with 6 letters)