Talented child beginning to work less than class (10)
I believe the answer is:
wunderkind
'talented child' is the definition.
The definition suggests a singular noun which matches the answer.
'beginning to work less than class' is the wordplay.
'beginning to' says to take the initial letters.
'less than' becomes 'under' (eg under a certain number).
'class' becomes 'kind' (I've seen this in another clue).
The first letter of 'work' is 'w'.
'w'+'under'+'kind'='WUNDERKIND'
Can you help me to learn more?
(Other definitions for wunderkind that I've seen before include "Clever young person" , "Extraordinary issue" , "One having early success" , "Perhaps Mozart" , "Child prodigy" .)