Colette's soldiers (4)
I believe the answer is:
gigi
'colette's' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
I can't explain the remainder of the clue.
(Other definitions for gigi that I've seen before include "Lerner and Loewe musical and film" , "musical from the 1950s" , "Movie" , "1958 film, winner of 9 Academy Awards" , "1958 film musical from a Colette novel" .)