Crossword Genius

Anger over a disease (7)

Ross

I believe the answer is:

cholera

'disease' is the definition.
(cholera is a kind of health problem)

'anger over a' is the wordplay.
'anger' becomes 'choler' (synonyms).
'over' means one lot of letters go next to another (in a down clue, some letters go over others).
'choler'+'a'='CHOLERA'

(Other definitions for cholera that I've seen before include "bacterial disease" , "Solemn promise" , "Disease caught from contaminated water" , "Deadly, infectious disease" , "Acute intestinal infection from contaminated water or food" .)

I've seen this clue in The Globe and Mail and The Irish News.
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