Right time to show fury (4)
I believe the answer is:
rage
'fury' is the definition.
('rage' can be a synonym of 'fury')
'right time' is the wordplay.
'right' becomes 'r' (common abbreviation).
'time' becomes 'age' (age is a kind of time**).
'r'+'age'='RAGE'
'to show' is the link.
(Other definitions for rage that I've seen before include "Terrible temper" , "Mania" , "High dudgeon" , "Gear up in violent temper" , "Fad or anger" .)