In a terrible rage (7,3)
I believe the answer is:
hopping mad
'in a terrible rage' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hopping mad that I've seen before include "Furious (as a frog?)" , "Wild" , "in high dudgeon" , "In a terrible rage" , "Extremely angry (colloq.)" .)