Choir contingent (5)
I believe the answer is:
altos
'choir contingent' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for altos that I've seen before include "Singers" , "Females who sing in the lowest range" , "Choir members" , "Highest male, lowest female, voices" , "Lowest female singing voices" .)