Willing object of pursuit (4)
I believe the answer is:
game
This clue could be a double definition.
'willing object' is the first definition.
'game' can be an answer for 'willing' (game can mean willing to do something). I am unsure of the 'object' bit.
'pursuit' is the second definition.
(thesaurus)
'of' is the link.
Can you help me to learn more?
(Other definitions for game that I've seen before include "Eager and willing to accept challenge" , "have a flutter" , "Sport - willing - lame" , "For instance, go" , "computer pastime?" .)