Reformed lamina including uranium metal oxide (7)
I believe the answer is:
alumina
'metal oxide' is the definition.
'alumina' can be an answer for 'oxide' (I have seen 'Metallic oxide ' mean 'alumina' so perhaps 'oxide' could also mean 'alumina'). I am unsure of the 'metal' bit.
'reformed lamina including uranium' is the wordplay.
'reformed' is an anagram indicator.
'including' is an insertion indicator.
'uranium' becomes 'u' (U is the chemical symbol for uranium).
'lamina' anagrammed gives 'almina'.
'almina' placed around 'u' is 'ALUMINA'.
Can you help me to learn more?
(Other definitions for alumina that I've seen before include "Metallic oxide that is a constituent of many clays" , "Constituent of sapphire" , "Metal oxide found in many clays" , "Compound in many clays" , "Abrasive" .)