Relating to tailoring (9)
I believe the answer is:
sartorial
'relating to tailoring' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for sartorial that I've seen before include "Styled" , "About tailoring men's clothes, may possess elegance" , "for a fitting person" , "Relating to tailoring" , "Pertaining to dress" .)