French denizen (not new) is excited, wildly excited (8)
I believe the answer is:
frenzied
'wildly excited' is the definition.
(I've seen this before)
'french denizen not new is excited' is the wordplay.
'french' becomes 'fr'.
'not' suggests deleting specific letters.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'is excited' indicates an anagram.
'denizen' with 'n' taken away is 'deizen'.
'deizen' with letters rearranged gives 'enzied'.
'fr'+'enzied'='FRENZIED'
(Other definitions for frenzied that I've seen before include "Wildly excited or agitated" , "Frenetic" , "Violently agitated" .)