Fit of shivering (4)
I believe the answer is:
ague
'fit of shivering' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ague that I've seen before include "Malaria, for example" , "Sweating, shivering, fit (once)" , "Complaint" , "Hot and cold fever" , "Burning fever" .)