Hairstyle for busy people? (7)
I believe the answer is:
beehive
I believe this is a double definition.
'hairstyle' is the first definition.
(beehive is a kind of hairstyle)
'busy people?' is the second definition.
(community of busy bees)
'for' acts as a link.
(Other definitions for beehive that I've seen before include "Bouffant hairstyle" , "Busy insect home" , "Site of industry" , "Source of combs" , "place of business" .)