Crossword Puzzle Listening post

Clue: Listening post

Listening post? (KEYHOLE with 7 letters)
Guard's post (FRONTGATE with 9 letters)
Postfixes (ADDS with 4 letters)
Postage purchase (e.g. COIL with 4 letters)
Bad postures (STOOPS with 6 letters)
Post-wedding party (RECEPTION with 9 letters)
Post-waking comment (IMUP with 4 letters)
Third baseman Ron posthumously elected to the Hall of Fame in December 2011 (SANTO with 5 letters)
Postal credo word (NOR with 3 letters)
Post-shower powder (TALC with 4 letters)