[Inkscape-user] Newbie question about tiled clones

I'm trying to do what should be a simple cloning job and I don't understand the tiled clones dialogue.

I need to do something similar to the twelve-stars-in-a-circle described in the Tricks subsection of the Tiling section of the user manual.

I need to do the following:

I have a circle. Inside the circle I draw an arrow, with the blunt end of the arrow just below the center of the circle and the pointed end of the arrow near the perimeter of the circle, so that the arrow is pointing straight down.

I need to clone the arrow twice, so that the final result is three arrows radiating from the center of the circle, evenly spaced at 120 degrees.