Insanity, oddly enough, is not minimised (4)
I believe the answer is:
isnt
'not minimised' is the definition.
I can't judge whether this defines the answer.
'insanity oddly enough' is the wordplay.
'oddly enough' means one should take alternating letters.
The alternating letters of 'insanity' are 'ISNT'.
'is' is the link.
Can you help me to learn more?
(Other definitions for isnt that I've seen before include "denial?" , "Ain't" , "Does not happen to be" , "- - This A Lovely Day? (song)" , "When abridged, has none of the quality of" .)