Slow cycling through swamp for one of obstinate courage (7)
I believe the answer is:
bulldog
'slow' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for bulldog that I've seen before include "Tenacious animal" , "found at the end of a lead" , "Breed of canine; stationery clip" , "Animal, symbol of tenacity" , "Kind of clip" .)