"Rent" character who sings "Light My Candle" (4)
I believe the answer is:
mimi
(Other definitions for mimi that I've seen before include "showgirl" , "I'm, I'm mad about the heroine in 'La Boheme'" , "La Boheme character (whose tiny hand is frozen)" , "'They call me - - ' , (Lucia)" , "unfortunate sewer" .)