Bolt's run through these fans (4)
I believe the answer is:
nuts
'these fans' is the definition.
(both can mean enthusiasts)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for nuts that I've seen before include "Eccentric; coal lumps" , "Beans" , "Hard shells with edible kernels" , "Eg, filberts, hazels" , "Potty" .)