Crossword Genius

Swimmers' academy? (6)

Ross

I believe the answer is:

school

I believe this clue is a double definition.

'swimmers'' is the first definition.
(group of fish)

'academy?' is the second definition.
(academy is a kind of school)

(Other definitions for school that I've seen before include "Train - group of whales" , "Where one teaches" , "Educational facility" , "lots of swimmers" , "A number of swimmers joined" .)

I've seen this clue in The Guardian.
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