Crossword Genius

How pupil ends, limited by the result of zero labour? (9)

Ross

I believe the answer is:

unlearned

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

'zero labour?' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?

'how pupil ends limited by' is the wordplay.
I cannot quite understand how this works, but
'pupil' could be 'l' (as in a learner driver with L-plates on their car) and 'l' is found within the answer.
'by' could be 'near' (I've seen this in another clue) and 'near' is located in the leftover letters.
This may be the basis of the clue (or it may be nonsense).

'the result of' is the link.

Can you help me to learn more?

(Other definitions for unlearned that I've seen before include "ill-educated" , "Ignorant" .)

I've seen this clue in The Independent.
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