Fabric company clothing most of band with narrow stripe (9)
I believe the answer is:
crinoline
'fabric' is the definition.
(I know that crinoline is a type of fabric)
'company clothing most of band with narrow stripe' is the wordplay.
'company' becomes 'co' (abbreviation).
'clothing' is an insertion indicator (some letters cover up or clothe others).
'most of band' becomes 'rin' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'with' means one lot of letters go next to another.
'narrow stripe' becomes 'line' (a line is a strip or stripe).
'co' placed around 'rin' is 'crino'.
'crino'+'line'='CRINOLINE'
(Other definitions for crinoline that I've seen before include "Hooped petticoat" , "Outstanding skirt" , "Stiffened petticoat worn to puff out a skirt" , "Hooped skirt of previous times" , "Material" .)