Is spurred furiously and staggered (9)
I believe the answer is:
surprised
'staggered' is the definition.
(thesaurus)
'is spurred furiously' is the wordplay.
'furiously' is an anagram indicator.
'is'+'spurred'='isspurred'
'isspurred' is an anagram of 'SURPRISED'.
'and' acts as a link.
(Other definitions for surprised that I've seen before include "hit for six" , "Caught in the act" , "Mildly astonished" , "Lost for words" , "left open-mouthed" .)