Works with minimal weight (9)
I believe the answer is:
operettas
'works with minimal weight' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for operettas that I've seen before include "Musical compositions as by Gilbert & Sullivan" , "Performances" , "10d [IOLANTHE], 45d [RUDDIGORE] and 6a [PRINCESS IDA], say" , "Light musicals for poetaster" .)