Platform, dais (7)
I believe the answer is:
rostrum
I believe this is a double definition.
'platform' is the first definition.
(I know that rostrum is a type of platform)
'dais' is the second definition.
(I know that dais can be written as rostrum)
(Other definitions for rostrum that I've seen before include "Raised platform" , "At which one may conduct" , "Rum rots (anag)" , "Platform for speaker" , "Platform for orchestra conductor" .)