Crossword Genius

Train group of dolphins (6)

Ross

I believe the answer is:

school

I believe this clue is a double definition.

'train' is the first definition.
(both can mean to teach or coach)

'group of dolphins' is the second definition.
(a group of dolphins is called a school)

(Other definitions for school that I've seen before include "Centre of learning" , "training centre" , "Sect, faction" , "a lot of swimmers" , "Place of learning" .)

I've seen this clue in The Times.
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