Crossword Genius

Youngster turned out for walk in park (6,4)

Ross

I believe the answer is:

childs play

I'm a little stuck... Click here to teach me more about this clue!

'walk in park' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'youngster turned out' is the wordplay.
'youngster' becomes 'child' (synonyms).
'turned out' becomes 'splay' (I can't explain this - if you can you should believe this answer much more).
'child'+'splay'='CHILDS-PLAY'

'for' is the link.

Can you help me to learn more?

(Other definitions for childs play that I've seen before include "A piece of cake" , "A thing that's very easy to do" , "A doddle" , "A dramatisation of the nativity" , "Something very easy to do" .)

I've seen this clue in The Times.
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