Children’s play with relative’s friend (4,5)
I believe the answer is:
aunt sally
'children's play' is the definition.
I can't judge whether this defines the answer.
'with relative's friend' is the wordplay.
'with' says to put letters next to each other.
'relative's' becomes 'aunts' (aunt is a kind of relative).
'friend' becomes 'ally' (synonyms).
'aunts'+'ally' is 'AUNT SALLY'.
Can you help me to learn more?
(Other definitions for aunt sally that I've seen before include "Female relation used as a target in throwing game" , "Lusty Lana as target of criticism or missiles" , "laughing stock" , "Fair target" , "Target for abuse" .)