A guy in my league just lost Daniels and wants Clark. I also have Celek so the drop off wouldnt be that great however, I feel that if I trade and elite talent it should be for something worth MORE than what I’m giving up. I am in a 12 team 8 keeper league with standard scoring, non ppr. So what can I expect as far as a player in return? By the way he offered Burleson as a starting point.

I would look to deal Celek not Clark.  And Burleson isn't enough.

If you HAVE to start a TE, you should keep Clark unless you’re getting a WR2 type in return or a prospect you feel very strongly about. A guy like Crabtree right now comes to mind as the type of player I’d be looking to get. Clark is going to crack 1000 yards receiving this year, and I wouldn’t sell him right now unless you’re getting something great in return.

I traded away Clark preseason for Derrick Ward, because I really needed a RB3 and already had Z Miller and Greg Olsen who were both supposed to be great. It still remains that elite TE talent is hard to come by and if you have to start a TE you should hold on. Burleson isn’t even close. Don’t make the same mistake I did haha.