Shiny silver transformed meal (6)
I believe the answer is:
agleam
'shiny' is the definition.
(agleam means gleaning or shining)
'silver transformed meal' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'transformed' is an anagram indicator.
'meal' with letters rearranged gives 'leam'.
'ag'+'leam'='AGLEAM'
(Other definitions for agleam that I've seen before include "Shining brightly" , "Bright" , "scintillating" , "Sparkling" .)