Incitement (11)
'incitement' is the definition.
(thesaurus)
This is the entire clue.
(Another definition for instigation that I've seen is " Initiation, prompting".)
'incitement' is the definition.
(spur is a kind of incitement)
This is the entire clue.
(Other definitions for spur that I've seen before include "Kick out" , "Sharp pointed projection" , "'Urge, goad (4)'" , "slip road" , "Goad, prod" .)