Good pastry (shortcrust) leads to intense cramps of the stomach (7)

I believe the answer is:

gastric

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'of the stomach' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

(Other definitions for gastric that I've seen before include "touching stomach" , "Abdominal" , "Intestinal" , "Relating to or involving the stomach" , "of the corporation?" .)

I've seen this clue in The Guardian.

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