Old writer — look down and be amazed (4-4)

I believe the answer is:

open-eyed

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for open-eyed that I've seen before include "Forming an encrusted mass" , "Astonished; fully aware" , "Surprised - aware" , "Astonished - watchful" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app