"About the author" blurb (3)
I believe the answer is:
bio
'about the author blurb' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bio that I've seen before include "Prefix or combining form meaning of living things" , "Prefix denoting life" , "Prefix meaning life, of living things" , "Life story (abbr)" , "A life's work" .)