Crossword Genius

… leaving spiritualism to go off for some pudding (8)

Ross

I believe the answer is:

tiramisu

'pudding' is the definition.
(type of dessert or pudding)

I cannot understand how the rest of the clue works.

(Other definitions for tiramisu that I've seen before include "Arenaceous material" , "Rich Italian dessert" , "Dessert soaked in alcohol" , "for which damp sponge is needed" , "Dessert (Italian "pick me up")" .)

I've seen this clue in The Guardian.
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