Carelessness in kiss stolen by ordinary people (6)
I believe the answer is:
laxity
'carelessness' is the definition.
(I know that laxity is a type of neglectfulness)
'kiss stolen by ordinary people' is the wordplay.
'kiss' becomes 'x' (X can represent a kiss).
'stolen by' is an insertion indicator (inserted letters are taken or stolen).
'ordinary people' becomes 'laity' (I've seen this before).
'x' inserted inside 'laity' is 'LAXITY'.
'in' is the link.
(Other definitions for laxity that I've seen before include "Slackness, absence of discipline" , "Looseness, slackness" , "Neglect" , "Lack of precision" , "indifference" .)