Crossword Genius

Kids’ game to get behind selective diner (4,5)

Ross

I believe the answer is:

jack sprat

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

'selective diner' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'kids' game to get behind' is the wordplay.
'kids' game' becomes 'jacks' (I've seen this in another clue).
'to get' says to put letters next to each other.
'behind' becomes 'prat' (synonyms).
'jacks'+'prat'='JACK SPRAT'

Can you help me to learn more?

(Other definitions for jack sprat that I've seen before include "He ate no fat" , "He ate only lean" , "His wife could eat no lean" , "he stuck to a fat-free diet" , "One leaving fat" .)

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.