Platforms (6)
'platforms' is the definition.
(stage is a kind of platform)
This is all the clue.
(Other definitions for stages that I've seen before include "Sagest kind of play venues" , "Sagest venues for plays" , "Shows" , "Platforms in theatres" , "Arranges" .)
'platforms' is the definition.
(rostrum is a kind of platform)
This is the entire clue.
(Other definitions for rostra that I've seen before include "The beaks" , "stages" , "where they make their speeches?" , "Raised platforms" .)