Chicken crossing a road? Hurry (6)
I believe the answer is:
hasten
'hurry' is the definition.
('hasten' can be a synonym of 'hurry')
'chicken crossing a road?' is the wordplay.
'chicken' becomes 'hen' (hen is a kind of chicken).
'crossing' indicates putting letters inside.
'road?' becomes 'st' (**).
'a'+'st'='ast'
'hen' placed around 'ast' is 'HASTEN'.
(Other definitions for hasten that I've seen before include "Speed up" , "Act or move fast" , "dash" , "Athens (anag.)" , "Be quick to do something" .)