Cooled that hot enthusiast Edward (6)
I believe the answer is:
fanned
'cooled that hot' is the definition.
'fanned' can be an answer for 'cooled' (I've seen this before). I am not certain of the rest of the definition.
'enthusiast edward' is the wordplay.
'enthusiast' becomes 'fan' (fan is a kind of enthusiast).
'edward' becomes 'ned'.
'fan'+'ned'='FANNED'
Can you help me to learn more?
(Other definitions for fanned that I've seen before include "Cooled" , "Winnowed" , "Created current of air, as to stimulate fire" , "Ventilated" , "Drove current of air upon, say flame" .)