Go-between crushed spirit of resistance (6)
I believe the answer is:
broker
'go-between' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for broker that I've seen before include "Middleman, dealer" , "See 16" , "Insurance or investment agent" , "One acts as an agent for others in buying and selling" , "Agent paid by commission" .)