Lack of guilt has criminal nine once worried about getting caught (9)
I believe the answer is:
innocence
'lack of guilt' is the definition.
(I've seen this before)
'criminal nine once worried about getting caught' is the wordplay.
'criminal' indicates anagramming the letters.
'worried' is an anagram indicator (worry can mean to interfere with or disturb).
'about' becomes 'c' (circa).
'getting caught' indicates putting letters inside.
'once' anagrammed gives 'ocen'.
'ocen'+'c'='ocenc'
'nine' is an anagram of 'inne'.
'inne' placed around 'ocenc' is 'INNOCENCE'.
'has' is the link.
(Other definitions for innocence that I've seen before include "Blamelessness" , "clean?" , "Naivety" , "Honesty" , "lack of conviction" .)