Incentive (4)
'incentive' is the definition.
(spur can mean an incentive or stimulus)
This is the entire clue.
(Other definitions for spur that I've seen before include "Drive on" , "Goad - branch line" , "Egg on or goad as horseman might" , "Goad as for use by horse-rider" , "'Urge, goad (4)'" .)
'incentive' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for stimulus that I've seen before include "Incentive, provocation" , "Goad" , "Cause of a response" , "Incitement to activity" , "Something that rouses to action" .)
'incentive' is the definition.
(as in a carrot and stick)
This is the entire clue.
(Other definitions for carrot that I've seen before include "Rewarding vegetable?" , "Tapering vegetable" , "Vegetable to entice the donkey" , "orangey colour" , "veg" .)
'incentive' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for impetus that I've seen before include "Driving force, momentum" , "Imputes to force with which a body moves" , "Drive" , "Force that moves something along" , "Momentum, stimulus" .)
'incentive' is the definition.
(thesaurus)
This is the entire clue.
(Another definition for motivation that I've seen is " Push".)
'incentive' is the definition.
(I know that incentive can be written as inducement)
This is the entire clue.