Crossword Genius

Grace ill, badly suffering from a reaction (8)

Ross

I believe the answer is:

allergic

'suffering from a reaction' is the definition.
(reacting due to an allergy)

'grace ill badly' is the wordplay.
'badly' indicates an anagram.
'grace'+'ill'='graceill'
'graceill' anagrammed gives 'ALLERGIC'.

(Other definitions for allergic that I've seen before include "Hypersensitive (to certain substances)" , "Having an adverse reaction (to something)" , "Hypersensitive to something" , "Having unfavourable reaction to, say pollen" , "Physically intolerant" .)

I've seen this clue in The Telegraph.
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