The puzzles' answers are as follows, presented in alphabetical order:
AESOPIAN BARON PIERCY ELOPING EPISODIC LOOSE TYPING MIKE PIAZZA NEON PINK PIN NUMBER PITA BREAD REPINING UNPILOTED VARIABLE PITCH
Note that the puzzle answers each have exactly one instance of the letter sequence PI and exactly one instance of the letter E. The answers can be uniquely arranged in order from 1 through 12 so that the answer in the Nth position has PI located at the Xth position in the answer where X is the Nth digit of pi, and that the answer in the Nth position has E located at the Yth position in the answer where Y is the Nth digit of e. Pair the answers in this order with the list of numbers in the ascending order given to get:
7/11: REPINING 10/11: PITA BREAD 11/10: ELOPING 3: PIN NUMBER 7: AESOPIAN 11: VARIABLE PITCH 17: EPISODIC 20: BARON PIERCY 27: NEON PINK 70: UNPILOTED 73: MIKE PIAZZA 77: LOOSE TYPING
Note that the numbers given, when expressed in words, contain only the vowel E of the vowels AEIOU. Count the number of E's in each of the numbers given, and index into each respective answer:
SEVEN ELEVENTHS (5): REPI(N)ING TEN ELEVENTHS (4): PIT(A) BREAD ELEVEN TENTHS (4): ELO(P)ING THREE (2): P(I)N NUMBER SEVEN (2): A(E)SOPIAN ELEVEN (3): VA(R)IABLE PITCH SEVENTEEN (4): EPI(S)ODIC TWENTY (1): (B)ARON PIERCY TWENTY-SEVEN (3): NE(O)N PINK SEVENTY (2): U(N)PILOTED SEVENTY-THREE (4): MIK(E) PIAZZA SEVENTY-SEVEN (4): LOO(S)E TYPING
The answer is NAPIER'S BONES.