Material with little objective percentage return (5)
I believe the answer is:
crepe
'material' is the definition.
(I know that crepe is a type of material)
'with little objective percentage return' is the wordplay.
'with' says the answer is hidden in the clue.
'return' says the letters should be written backwards.
'eperc' is hidden in the letters of 'little objective percentage'.
'eperc' back-to-front is 'CREPE'.
(Other definitions for crepe that I've seen before include "Light fabric with a crinkled surface" , "Flat French food" , "Crinkled paper or fabric" , "Light fabric; pancake" , "Thin twenty four Ac" .)