Guided tours initially cancelled — flip! (3,3)
I believe the answer is:
see red
'flip' is the definition.
(both can mean to become angry suddenly)
I cannot understand how the remainder of the clue works.
(Other definitions for see red that I've seen before include "Lose temper as bull might" , "Grow furious" , "Become suddenly angry" , "lose control" , "Become angry as bull might" .)