I hear a ticking sound when I accelarate my 1995 Subaru LEG L/OUT. What can the mechanical problem be?

I hear a ticking sound when I accelarate my 1995 Subaru LEG L/OUT. What can the mechanical problem be?
My Subaru has over 188,000 miles on it, engine has good power but tires are a little old and uneven. Ticking sound is slowly getting louder. I can only hear it from the outside when I am driving and my windows are open. Thank You.

Answers: