It's rotten waiting for a ball that just goes into the net (3,7)

I believe the answer is:

bad service

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

'a ball that just goes into the net' is the definition.
I know nothing about this answer so I can't judge whether this works.

'it's rotten waiting' is the wordplay.
'it's rotten' becomes 'bad' (similar in meaning).
'waiting' becomes 'service' (I've seen this before).
'bad'+'service'='BAD SERVICE'

'for' is the link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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