Hairstyle; attendant (7)
I believe the answer is:
pageboy
This clue is a double definition.
'hairstyle' is the first definition.
(I know that pageboy is a type of hairstyle)
'attendant' is the second definition.
(boy attending a bride at a wedding)
(Other definitions for pageboy that I've seen before include "train supporter" , "Hairstyle - child at wedding" , "Youthful hotel attendant" , "Young bridal attendant" , "Hotel worker; hairstyle" .)