Answer:
What is often returned, but never borrowed/
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain. Doing no harm, and feeling no pain.
My first is in blood and also in battle. My second is in acorn, oak, and apple. My third and fourth are both the same. In the center of sorrow and twice in refrain. My fifth starts eternity ending here. My last is the first of last, Oh Dear.
Hold the tail, while I fish for you.
My first is equality; my second is inferiority; my whole is superiority.
Keep doing me to avoid lens dryness