Locates upsetting quotes: "ET autistic?" "Somewhat" (8)
I believe the answer is:
'locates' is the definition.
('situate' can be a synonym of 'locate')
'upsetting quotes et autistic? somewhat' is the wordplay.
'upsetting' says the letters should be written in reverse.
'somewhat' indicates the answer is hidden within the clue.
'setautis' is hidden in the letters of 'quotes et autistic'.
'setautis' back-to-front is 'SITUATES'.