Shivering fit (4)
I believe the answer is:
ague
'shivering fit' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ague that I've seen before include "Hot and cold fever" , "Malarial fever or fit of shivering" , "Burning fever" , "met with cheek in Twelfth Night" , "Complaint" .)