Pop music routine? (3,7)

I believe the answer is:

dad dancing

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

'routine?' is the definition.
Both the answer and definition are adjectives.
Maybe there's a link between them I don't understand?

'pop music' is the wordplay.
'pop' becomes 'dad' (both can mean one's father).
'music' becomes 'dancing' (I can't explain this - if you can you should believe this answer much more).
'dad'+'dancing'='DAD DANCING'

Can you help me to learn more?

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app