1) Achieving perfection 2) Exactly 3) Exactly as required 4) Flawlessly 5) How perfectionists do things 6) Impeccably 7) In every detail, perfectly 8) In every respect 9) Just as it should be 10) Just right 11) Just so 12) Like a glove 13) Masterfully 14) Not just approximately 15) Not sloppily 16) On the nose Found on https://www.crosswordclues.com/clue/toat