University eight maybe that goes to pieces in the water? (8)

I believe the answer is:

bathcube

'that goes to pieces in the water?' is the definition.
(a bathcube dissolves in the bath)

'university eight maybe' is the wordplay.
'university' becomes 'Bath' (University of Bath).
'eight maybe' becomes 'cube' (eight is two cubed).
'bath'+'cube'='BATHCUBE'

I've seen this clue in The Times.

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