Apprentice never tried out leads for setter (4)

I believe the answer is:

anto

'setter' is the definition.
(Guardian crossword setter)

'apprentice never tried out leads' is the wordplay.
'leads' says to take the initial letters.
The first letters of 'apprentice never tried out' is 'ANTO'.

'for' acts as a link.

I've seen this clue in The Guardian.

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