Sort to dance beside curious platform (7)
I believe the answer is:
rostrum
'platform' is the definition.
(I know that rostrum is a type of platform)
'sort to dance beside curious' is the wordplay.
'to dance' is an anagram indicator (letters must dance around).
'beside' says to put letters next to each other (I've seen this in other clues).
'curious' becomes 'rum' (synonyms).
'sort' anagrammed gives 'rost'.
'rost'+'rum'='ROSTRUM'
(Other definitions for rostrum that I've seen before include "beak" , "Conductor's dais" , "Platform for speaker" , "Rum rots (anag)" , "At which one may conduct" .)