Flipping catastrophe leading to ill temper (4)
I believe the answer is:
mood
'ill temper' is the definition.
'flipping catastrophe' is the wordplay.
'flipping' is a reversal indicator.
'catastrophe' becomes 'doom' (I've seen this before).
'doom' written backwards gives 'MOOD'.
'leading to' is the link.
(Other definitions for mood that I've seen before include "melancholy" , "Emotional state" , "State of mind or feeling" , "Bad feeling" , "Low spirits" .)