Raised platform is supporting US lawyer (4)
I believe the answer is:
dais
'raised platform' is the definition.
(I've seen this before)
'is supporting us lawyer' is the wordplay.
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'us lawyer' becomes 'da' (abbreviation for District Attorney).
'is' after 'da' is 'DAIS'.
(Other definitions for dais that I've seen before include "Throne platform" , "stepping up here?" , "Raised floor" , "Piece of old cloth" , "device to give some an uplift at conference?" .)