Call turn, check river. The same line you´d probably take with a set. If you x/r the turn and/or lead the river, you´re signalling your hand pretty obviously. Yeah, it sucks if the board pairs and Villain shoves - or the board pairs and Villain checks behind with his J-high flush, but there´s nothing you can do about it in my opinion, if Villain is a strong player, he shouldn´t expect you to x/r the turn with anything but the nuts, after having led out in a 5-way pot.

first instinct is to call and chk river.  there will be like ~1.1x psb left on river if you flat turn.  on most blank rivers he will probably value bet 40 to70pct pot with a lot of different flush combos for value. at that point we cr ai with the nuts (even though you probably are not bluffing much here ever) and if he makes a hero fold so be it.

Thoughts on x-r turn ever(although i rarely do it with naked Kh)..

@PurplePanda

I would never lead out sets on the flop in a 5-way pot on a monotone board..especially in these deep cash games,whr ppl call with so many suited hands pre-flop..So given this action,will the villain be comfortable betting the river??or wht % of the times he is betting the river??                   

I agree with check/call and check river. 

The deeper and deeper you get in these games the more important deception gets.  Especially against good opponents. 

I'm 3betting flop. Don't see a better way to shovel a lot of money into the pot.