Answer:
What can burn the eyes, sting the mouth, yet be consumed?
What flies without wings? What passes all things? What mends all sorrow? What brings the morrow?
My first is a creature whose breeding is unclear. My second, a price you must pay. My whole can be found in the river of Time and refers to events of today.
Break it and it is better, immediately set and harder to break again.
I know a word of letters three. Add two, and fewer there will be!
I have two eyes in the front and a lot of eyes on my tail