Fabric screen divides eleven threads (9)
I believe the answer is:
velveteen
'fabric' is the definition.
(I know that velveteen is a type of fabric)
'screen divides eleven threads' is the wordplay.
I cannot really understand how this works, but
'screen' could be 'vet' (screen can mean to check or vet) and 'vet' is present in the answer.
an anagram of 'eleven' is 'veleen' which is within the left over letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for velveteen that I've seen before include "Cotton fabric with thick pile" , "Cotton fabric with soft pile" .)