New tonal nail (5)
I believe the answer is:
talon
'nail' is the definition.
(thesaurus)
'new tonal' is the wordplay.
'new' is an anagram indicator.
'tonal' with letters rearranged gives 'TALON'.
(Other definitions for talon that I've seen before include "Tonal (anag.)" , "Hooker" , "Raptor's claw" , "Claw; undealt cards" , "Part of hobby" .)