Nails clause, reportedly? (6)
I believe the answer is:
talons
'nails' is the definition.
(thesaurus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for talons that I've seen before include "Sharp hooked claws" , "Claws of a bird" , "Sharply hooked claws" , "Hooked claws of birds of prey" .)