Kisses following small errors (5)
I believe the answer is:
slips
'errors' is the definition.
(I know this)
'kisses following small' is the wordplay.
'kisses' becomes 'lips' (kiss on the lips).
'following' is a charade indicator (letters next to each other).
'small' becomes 's' (abbreviation - e.g. clothes size).
'lips' after 's' is 'SLIPS'.
(Other definitions for slips that I've seen before include "errors" , "They try to catch you" .)