24 down
I’m
shivering
in
second
class,
getting
basic
education
(4)
I’m shivering in second class, getting basic education (4)
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The definition is at the beginning of the clue.
How the clue works
The definition is I'm shivering, which is what someone might say when cold — BRRR! The wordplay is a charade: B represents second class (if A is first class, then B is second), followed by RRR from basic education, referring to the famous "three R's" (Reading, wRiting, and aRithmetic). Put them together and you get B + RRR = BRRR.