Is a name for a child (5)
I believe the answer is:
issue
'for a child' is the definition.
(I've seen this before)
'is a name' is the wordplay.
'a name' becomes 'sue' ().
'is'+'sue'='ISSUE'
(Other definitions for issue that I've seen before include "something to discuss" , "Put out; result" , "Problem or concern" , "Kids" , "Result, outcome; topic" .)