Hide product from diminished ruler with little experience (8)
I believe the answer is:
shagreen
'hide' is the definition.
(thesaurus)
'product from diminished ruler with little experience' is the wordplay.
I cannot quite see how this works, but
'from' could be 'e' (I've seen this in other clues) and 'e' is present in the answer.
'ruler' could be 'gr' (short for Georgius Rex, King George in Latin) and 'gr' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for shagreen that I've seen before include "Sharkskin used as a decorative material" , "Sharkskin - he ranges (anag)" , "rough skin" , "Coarse leather, often dyed green" , "Nags here (anag.)" .)