He hammered Spike not going the distance (4)
I believe the answer is:
thor
'he' is the definition.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for thor that I've seen before include "Divine figure" , "Norse god for whom Thursday is named" , "Germanic thunder god; early US IRBM" , "Norse hammer-wielding god" , "The Thunderer" .)