issue

the issue of something 

 raise an issue =say that an issue should be discussed

address an issue =discuss or deal with an issue  

resolve an issue avoid/dodge/duck/evade an issue avoid discussing an issue=  

confuse/cloud an issue =make an issue more difficult by talking about things not related to it  

important/key/major/big issue thorny/vexed issue difficult issue= 

 complex issue sensitive issue political/social/economic/environmental issues something is not the issue spoken =used to say that something is not the important part of what you are discussing