Guardianship for nothing? No worries! (8)

I believe the answer is:

carefree

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'guardianship for nothing? no worries' is the definition.
I can't tell whether this defines the answer.

'guardianship for nothing?' is the wordplay.
'guardianship' becomes 'care' (synonyms).
'for nothing?' becomes 'free' (I've seen this before).
'care'+'free'='CAREFREE'

Can you help me to learn more?

(Other definitions for carefree that I've seen before include "relaxed" , "Without worry or responsibility" , "Roughly, heartless judge gives" , "Not worried" , "not concerned?" .)

I've seen this clue in The Sun.

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