Honestly, killing clickers is 90% of the time not worth it. You can move through any section with them without a fight, and no matter what a fight is going to cost you resources. What part are you at (in spoilers) maybe someone here can point you to the exit?
Thanks. I just found it, after walking right past that part probably 10x.
I'm in "downtown." It looks like some kind of subway terminal. There was a ladder up above I was supposed to pull down, but it wasn't even in view at all. I'm just surprised. I only noticed the small triangle icon after going past that area a ton of times.
It's right when you first get the molotov. I guess they wanted you to use it on the clicker, because there is one right there. So you basically have to kill it to move on. I was trying to avoid killing them and I was saving the molotov. I can see now what they had in mind, but it was not very clear to me at the time.