Cotton fabric feature with trimming in topaz (6)
I believe the answer is:
chintz
'cotton fabric' is the definition.
(I've seen this before)
'feature with trimming in topaz' is the wordplay.
'feature' becomes 'chin' (chin is a kind of feature).
'with' says to put letters next to each other.
'trimming in topaz' becomes 'tz' (I can't explain this - if you can you should believe this answer much more).
'chin'+'tz'='CHINTZ'
Can you help me to learn more?
(Other definitions for chintz that I've seen before include "Curtain material" , "(Sometimes glazed) fabric cotton" , "Printed, patterned cotton fabric" , "Glazed cotton cloth with printed pattern" , "Cotton cloth with printed patterns used for furnishings" .)