Figure corporation should receive a prize for corruption (9)
I believe the answer is:
trapezium
'figure' is the definition.
(trapezium is a kind of figure)
'corporation should receive a prize for corruption' is the wordplay.
'corporation' becomes 'tum' ('corporation' is a humorous term for stomach fat).
'should receive' is an insertion indicator.
'for corruption' is an anagram indicator (I've seen this in other clues).
'a'+'prize'='aprize'
'aprize' is an anagram of 'rapezi'.
'tum' going around 'rapezi' is 'TRAPEZIUM'.
(Other definitions for trapezium that I've seen before include "Type of quadrilateral" , "Four-sided figure" , "Geometric shape" , "Form of quadrilateral" , "Quadrilateral with a parallel pair of sides" .)