Supporters love goalies going to extremes (4)
I believe the answer is:
legs
'supporters' is the definition.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for legs that I've seen before include "Stages of a journey" , "Members" , "Lower limbs" , "associated with 11 in game" , "Sections of a journey or course" .)