Water source with parking assistance, nice little earner! (4-4)

I believe the answer is:

well-paid

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

'water source with parking assistance nice little earner' is the definition.
I can't judge whether this defines the answer.

'water source with parking assistance' is the wordplay.
'water source' becomes 'well' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'parking' becomes 'p' (abbreviation on road signs).
'assistance' becomes 'aid' (synonyms).
'well'+'p'+'aid'='WELL-PAID'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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