You'll get no flannel from him! (5)
I believe the answer is:
serge
'him' is the definition.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for serge that I've seen before include "A twill fabric" , "Durable fabric" , "Stuff" , "Twilled fabric; name" , "Twilled woollen fabric" .)