FWIW I have heard that on my wheels and the clicking was where spokes crossed. Cleaning those places off between the spokes and it went away, even a little oil there. See if that eliminates the ticking, and then if spoke tension is badly off you can feel it just by squeezing the adjacent spokes. It won't hurt the true to tighten up a badly under-tensioned spoke so special wheel-building skills or tools aren't really necessary.