Sudden jab ruptured it internally (6)

I believe the answer is:

abrupt

'sudden' is the definition.
(similar in meaning)

'jab ruptured it internally' is the wordplay.
'internally' indicates a hidden word.
'ABRUPT' is hidden in the letters of 'jab ruptured it'.

(Other definitions for abrupt that I've seen before include "Sudden, brusque" , "Unexpected -- precipitous" , "Short, sharp or sudden" , "Sudden, maybe discourteous" , "Hurried or curt" .)

I've seen this clue in The Irish Times.

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