New gallery producing bad reaction (7)
I believe the answer is:
'bad reaction' is the definition.
'allergy' can be an answer for 'reaction' (I've seen this before). I'm not certain of the 'bad' bit.
'new gallery' is the wordplay.
'new' indicates anagramming the letters.
'gallery' is an anagram of 'ALLERGY'.
'producing' acts as a link.
Can you help me to learn more?
(Other definitions for allergy that I've seen before include "unhealthy reaction" , "Abnormal sensitivity to a food" , "Unfavourable reaction to, say, pollen" , "Hypersensitivity to a substance" , "Pathological aversion" .)