Sparkle, giving low-down about border (7)
I believe the answer is:
glisten
'sparkle' is the definition.
(I know that sparkle can be written as glisten)
'low-down about border' is the wordplay.
'low down' becomes 'gen' (I've seen this in other clues).
'about' is an insertion indicator.
'border' becomes 'list' (list can mean a border on cloth).
'gen' going around 'list' is 'GLISTEN'.
'giving' is the link.
(Other definitions for glisten that I've seen before include "Shine or sparkle wetly" , "Shine with reflected light" , "'Shine, as if wet (7)'" , "Shine like something wet" , "Singlet (anag.); tingles (anag.)" .)