Stomach upset? Dieting is no different (11)

I believe the answer is:

indigestion

'stomach upset?' is the definition.
('indigestion' can be a synonym of 'stomach upset')

'dieting is no different' is the wordplay.
'different' indicates anagramming the letters.
'dieting'+'is'+'no'='dietingisno'
'dietingisno' anagrammed gives 'INDIGESTION'.

(Another definition for indigestion that I've seen is " Dyspepsia".)

I've seen this clue in The Telegraph.

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