This could be said from the platform (4)
I believe the answer is:
dais
'the platform' is the definition.
(dais is a kind of platform)
'this could be said' is the wordplay.
'this could be' is an anagram indicator.
'said' anagrammed gives 'DAIS'.
'from' is the link.
(Other definitions for dais that I've seen before include "Platform, rostrum" , "support for speaker" , "Speaker's raised platform" , "device to give some an uplift at conference?" , "Said (anag.)" .)