Child taken round new class (4)
I believe the answer is:
kind
'class' is the definition.
(thesaurus)
'child taken round new' is the wordplay.
'child' becomes 'kid' ('kid' can be a synonym of 'child'**).
'taken round' indicates putting letters inside.
'new' becomes 'n'.
'kid' placed around 'n' is 'KIND'.
(Other definitions for kind that I've seen before include "Obliging" , "Class, type" , "Generous - type" , "Type; helpful" , "Character, nature" .)