I have a yellow tang and a purple tang living in peace with the clown trigger. Make sure the clown is a "wee" bit smaller than the tangs and you should have no problems.
Here's a little kicker... my friend has a clown trigger and a few shrimps in the same tank, it has been over 8 months now and he is yet to lose a shrimp! Seems like the clown is not interested in the shrimps, and no, the shrimps are not hiding, they are out in the open. Hmmmm.