Mediocre pencil skirts' material (5)
I believe the answer is:
crepe
'material' is the definition.
(I know that crepe is a type of material)
'mediocre pencil skirts'' is the wordplay.
'CREPE' is hidden in amongst the letters.
However, I am not sure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for crepe that I've seen before include "Light fabric; pancake" , "Light fabric with a crinkled surface" , "Soft thin fabric with a crinkled surface" , "Fabric with a wrinkled surface" , "Finely wrinkled fabric" .)