Feature of trousers about to go in luggage? (6)
I believe the answer is:
crease
'feature of trousers' is the definition.
(I've seen this before)
'to go in luggage?' is the wordplay.
'to go' becomes 're' (I've seen this in other clues).
'in' indicates putting letters inside.
'luggage?' becomes 'case' (luggage is a kind of case).
're' inserted inside 'case' is 'CREASE'.
'about' is the link.
(Other definitions for crease that I've seen before include "Furrow; cricket line" , "Fold in clothes" , "Fold in clothing" , "Furrow, wrinkle" , "Dagger rarely" .)