Crossword Genius

Fish and rabbit order: parents do it (6,3)

Ross

I believe the answer is:

school run

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

'fish and rabbit' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'order parents do it' is the wordplay.
I cannot quite see how this works, but
'order' could be 'run' (run is a kind of order) and 'run' is found in the answer.
The remaining letters 'school' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Guardian.
Want a hint initially instead of a full solution? Install my app