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After vacation, liftboy chose uniform for school (6)

Ross

I believe the answer is:

lyceum

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'for school' is the definition.
(lyceum is a kind of school)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for lyceum that I've seen before include "French school or concert-hall" , "Aristotle's teaching place" , "College" , "Garden where Aristotle taught philosophy - London theatre" , "hall" .)

I've seen this clue in The Times.
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