Yeah..I would go with a cluck and try to bring him out of it...gives you much more target.
I have seen my fair share of birds put down by a struttin shot though, seems to kill em dead, espeically with the hevi-shot and its relatives.

If a cluck doesnt work, a simple yip from your mouth will make him pull up that snood and come outta strut.
A warning though, if you dont use a turkey noise to bring em out you best be ready to shoot, had a friend say, "Hi" to a bird, and when he came outta strut he waited for the shot a little too long. Bird saw him and ran.