Lack of hatred unusually (6)
I believe the answer is:
dearth
'lack of' is the definition.
(I've seen this before)
'hatred unusually' is the wordplay.
'unusually' indicates anagramming the letters.
'hatred' anagrammed gives 'DEARTH'.
(Other definitions for dearth that I've seen before include "Acute insufficiency" , "Scarcity - famine" , "Scarcity, paucity" , "Red hat for scarcity" , "Scarceness or lack" .)