Plucky people may have to pluck this (4)
I believe the answer is:
game
I believe this is a double definition.
'plucky' is the first definition.
(thesaurus)
'people may have to pluck this' is the second definition.
(game birds might need plucking)
(Other definitions for game that I've seen before include "Eager; pastime" , "Animal hunted for food or sport" , "Up for it; gamble" , "computer pastime?" , "Competitive activity with rules" .)