Stir cooking fat after hearing how long it lasts (7)
I believe the answer is:
turmoil
'stir' is the definition.
(synonyms)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for turmoil that I've seen before include "Brouhaha" , "racket" , "State of great commotion or disturbance" , "Unrest - upheaval" , "Tumult, upheaval" .)