1) Abbreviated john 2) Bathroom 3) Brief facilities 4) British washroom 5) Filipino filmmaker Diaz 6) Head 7) Head at the Elephant & Castle 8) Jakes 9) John 10) Lavatory 11) Little john 12) Loo, here 13) Mount Doom product 14) Pit-stop place 15) Place to make a pit stop 16) Place to wash up 17) Poop chute Found on https://www.crosswordclues.com/clue/lav