I'm on a break, following bad upset stomachs (8)

I believe the answer is:

abdomina

'stomachs' is the definition.
(plural of abdomen)

'i'm on a break following bad upset' is the wordplay.
'break' is an anagram indicator.
'following' is a charade indicator (letters next to each other).
'upset' indicates an anagram.
'im'+'on'+'a'='imona'
'imona' anagrammed gives 'omina'.
'bad' is an anagram of 'abd'.
'omina' after 'abd' is 'ABDOMINA'.

I've seen this clue in The Guardian.

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