Rubbish dump around platform (8)
I believe the answer is:
claptrap
'rubbish' is the definition.
(I've seen this before)
'dump around platform' is the wordplay.
'dump' becomes 'crap' (the act of defecation).
'around' indicates putting letters inside.
'platform' becomes 'lapt' (anagram of 'plat' - form from letters).
'crap' placed around 'lapt' is 'CLAPTRAP'.
(Other definitions for claptrap that I've seen before include "Tripe" , "Absurd or nonsensical talk or ideas" , "Pretentious talk used to win applause" , "moonshine" , "poppycock" .)