Child backing electronic book's cosmetic upgrade (4,3)
I believe the answer is:
nose job
'cosmetic upgrade' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'child backing electronic book's' is the wordplay.
'child' becomes 'son' (male child).
'backing' shows that the letters should be reversed in order.
'electronic' becomes 'e' (as in e-mail or e-books).
'book' becomes 'Job' (book of the Bible).
'son' back-to-front is 'nos'.
'nos'+'e'+'job'='NOSE JOB'
Can you help me to learn more?
(Other definitions for nose job that I've seen before include "Facial operation" , "Rhinoplasty" , "Assignment for features editor" , "work for boat race" , "Piece of plastic surgery" .)