1) Compresses 2) Forces down 3) Packs 4) Packs a pipe bowl 5) Packs down 6) Packs down firmly 7) Packs down tightly 8) Packs firmly 9) Pats down 10) Pounds down 11) Prepares a pipe 12) Presses down 13) Taps down Found on https://www.crosswordclues.com/clue/tamps