Natural tendency isn't wrong in court (8)
I believe the answer is:
instinct
'natural tendency' is the definition.
(I've seen this before)
'isn't wrong in court' is the wordplay.
'wrong' indicates an anagram.
'court' becomes 'ct'.
'isnt' anagrammed gives 'inst'.
'inst'+'in'+'ct'='INSTINCT'
(Other definitions for instinct that I've seen before include "Inborn impulse to behave in certain way" , "Innate feeling" , "Intuition, sixth sense" , "Gut reaction, impulse" , "Involuntary impulse" .)