Badger would be dangerous with one coming in for a run (5)
I believe the answer is:
harry
'badger' is the definition.
(I know that badger is a more specific form of the action bedevil)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for harry that I've seen before include "Ravage - prince" , "Make predatory raids" , "Torment by constant attack" , "one trained in spells, familiarly" , "Hound" .)