Thin fabric or pancake (5)
I believe the answer is:
crepe
This clue might be a double definition.
'thin fabric' is the first definition.
'crepe' can be an answer for 'fabric' (crepe is a kind of fabric). I'm not certain of the 'thin' bit.
'pancake' is the second definition.
(I know that crepe is a type of pancake)
'or' acts as a link.
Can you help me to learn more?
(Other definitions for crepe that I've seen before include "Light wrinkled fabric" , "Crinkled fabric - black armband - thin pancake" , "Thin twenty four Ac" , "Crinkly fabric and French pancake" , "Crinkly material" .)