Crossword Puzzle Cows' chorus

Clue: Cows' chorus

Nest chorus (CHEEPS with 6 letters)
"A Chorus Line" showstopper (ONE with 3 letters)
Chorus, e.g. (SINGERS with 7 letters)
Chorus from the flock (BAAING with 6 letters)
Chorus reject (MONOTONE with 8 letters)
Biofuel from cows (METHANEGAS with 10 letters)
Song from "A Chorus Line" (e.g. AND with 3 letters)
Cows, to Cowper (KINE with 4 letters)
Chorus starter in a 1972 David Bowie song ... or the theme of this puzzle, phonetically (CHCHCHCHCHANGES with 15 letters)
"In a cowslip's bell ___": "The Tempest" (ILIE with 4 letters)