About girl having elegance (5)
I believe the answer is:
class
'elegance' is the definition.
(class is a kind of elegance)
'about girl' is the wordplay.
'about' becomes 'c' (abbreviation for 'circa').
'girl' becomes 'lass' (lass is a kind of girl**).
'c'+'lass'='CLASS'
'having' acts as a link.
(Other definitions for class that I've seen before include "School group" , "Order - quality" , "School form" , "Category (of things)" , "Teaching group" .)