Crossword Genius

Called, being stuck in river, upset (7)

Ross

I believe the answer is:

derange

'upset' is the definition.
(deranging is a kind of upseting)

'called being stuck in river' is the wordplay.
'called' becomes 'rang' ('ring' can be a synonym of 'call').
'being stuck in' means one lot of letters goes inside another.
'river' becomes 'dee' (River Dee).
'rang' going inside 'dee' is 'DERANGE'.

(Other definitions for derange that I've seen before include "Throw into disorder" , "Unhinge" , "Craze" , "Drive mad" , "Make mad" .)

I've seen this clue in The Telegraph.
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