Crossword Genius

Fine tonic treated symptom of disease? (9)

Ross

I believe the answer is:

infection

'symptom of disease?' is the definition.
(as in an infectious disease)

'fine tonic treated' is the wordplay.
'treated' is an anagram indicator.
'fine'+'tonic'='finetonic'
'finetonic' is an anagram of 'INFECTION'.

(Other definitions for infection that I've seen before include "viral illness" , "Invasion of the body by pathogenic micro-organisms" , "Process of catching virus" , "Disease caught" , "Contamination by micro-organism" .)

I've seen this clue in The Telegraph.
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