In school, it takes some tackling (5)

I believe the answer is:

rugby

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'in school' is the definition.
'rugby' can be an answer for 'school' (English private school). I am not certain of the 'in' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for rugby that I've seen before include "Type of football; school" , "Sport with oval ball" , "Public school founded in 1567" , "Famous public school" , "Try game?" .)

I've seen this clue in the Evening Standard.

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