Nosey parker excludes Karen Hawk (6)
I believe the answer is:
osprey
'hawk' is the definition.
(osprey is a kind of hawk)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for osprey that I've seen before include "Fish-hawk" , "Large fish-eating bird of prey" , "Fish-eating 15 ac" , "Large bird that preys on fish in inland waters" , "predatory bird" .)