Guide in haste erratically (5)
I believe the answer is:
steer
'guide' is the definition.
(I know that guide can be written as steer)
'in haste erratically' is the wordplay.
'in' says the answer is hidden in the clue.
'STEER' is hidden within 'haste erratically'.
(Other definitions for steer that I've seen before include "Guide - castrated ox" , "Guide (a ship, car, etc)" , "Control movement" , "Guide; bullock" , "Exercise control" .)