Representation from nation hoarding uranium (6)
I believe the answer is:
statue
'representation' is the definition.
(I have seen 'Carved representation ' mean 'statue' so perhaps 'representation' could also mean 'statue')
'nation hoarding uranium' is the wordplay.
'nation' becomes 'state' ('state' can be a synonym of 'nation'**).
'hoarding' is an insertion indicator.
'uranium' becomes 'u' (U is the chemical symbol for uranium).
'state' going around 'u' is 'STATUE'.
'from' acts as a link.
(Other definitions for statue that I've seen before include "Firm figure" , "Carved representation" , "Stone figure" , "Noble's rank or dignity" , "Sculpture of person or animal" .)