11sp chain on 10sp chainset?

Yes, it will work fine.  The chain is thinner side to side, but the interior sizing is the same.  A 10sp chain won't work on 11sp gear, but 11sp chains work fine on 10sp, 9sp, etc.

Second the above , works fine for me

A 10sp chain won’t work on 11sp gear

I'm currently running a 10 speed Shimano chain on a 11 speed Shimano chain set. I think it's just at the cassette end there could be a problem. 

Thanks all!

I'm currently running a 10 speed Shimano chain on a 11 speed Shimano chain set

And I'm currently running an 8spd chain (Microshift acolyte 8spd setup) with a Shimano 12spd chainset. Works perfectly!

I've also run an 11spd chain on my gravel bike with 10spds for a couple of years. Again fine.

Hence gear, not chainset.  

I'm running 11 speed 105 with a 10 speed Ultegra chainset. Works perfectly.

I’m running a 12 speed chain on my singlespeed so nerr.
10/11sp chains are interchangeable with 10/11 speed gear components. 12 speed chains will work fine with 10 & 11 speed gears but don’t always play nice with narrow wide chainrings for the 1x crowd.