Adjustable loft ramp raised floor (8)
I believe the answer is:
platform
'raised floor' is the definition.
(I've seen this before)
'adjustable loft ramp' is the wordplay.
'adjustable' indicates an anagram.
'loft'+'ramp'='loftramp'
'loftramp' with letters rearranged gives 'PLATFORM'.
(Other definitions for platform that I've seen before include "Rostrum" , "Raised flooring or stage" , "Dais; political party's declared policy" , "Shoe with a high, thick sole" , "Raised horizontal surface" .)