Type of briefs used in the textile industry (6)
I believe the answer is:
fibres
'used in the textile industry' is the definition.
'type of briefs' is the wordplay.
'type of' is an anagram indicator (I've seen 'type' mean this).
'briefs' with letters rearranged gives 'FIBRES'.
(Other definitions for fibres that I've seen before include "thin strands or threads" , "They may be spun" , "Long slender substances" , "Threadlike substances" , "Long thin substances, threads" .)