Trembled with cold or fear (8)
I believe the answer is:
shivered
'trembled with cold or fear' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for shivered that I've seen before include "Shook" , "showed signs of cold" , "Trembled, with cold say" , "'Trembled, with cold or fear (8)'" .)