Crossword Genius

Coffee machine capsules for schools (4)

Ross

I believe the answer is:

pods

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'for schools' is the definition.
(both can mean groups of marine animals)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for pods that I've seen before include "Groups of dolphins" , "some seals" , "Pea-jackets" , "From enclosed cabins" , "Seed cases" .)

I've seen this clue in The Guardian.
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