Appreciate help in solving last three clues in quiz.
A. Let - - - - - - - - - - - - - - - - - - hymn of triumph sing [6,4,8]
The answer is alphabetically after Angels and before company
B. A universal choir is heard in a Co Durham town.
the answer is alphabetically after Company and before fellowship
C. This singer rearranged choir rest [9]
choir rest is an anagram of chorister, but answer alphabetically should start with A and be before Ariana.