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Lucy, self-reliant, used to pay attention (6,9)

Ross

I believe the answer is:

listen carefully

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

'lucy self-reliant used' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'pay attention' is the wordplay.
I cannot really see how this works, but
'attention' could be 'care' (synonyms) and 'care' is present in the answer.
This explanation may well be incorrect...

'to' acts as a link.

Can you help me to learn more?

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