noun

a means of attaining an end, especially one that is convenient but possibly improper or immoral.

the current policy is a political expedient

measure,means,method,stratagem,scheme,plan,course of action,solution,move,tactic,manoeuvre,recourse,resource,device,tool,contrivance,ploy,plot,machination,trick,ruse,artifice,invention,stopgap,dodge,lurk,shift,fetch