Kiss with audacity (4)
I believe the answer is:
neck
I believe this is a double definition.
'kiss' is the first definition.
(neck can informally mean to kiss)
'audacity' is the second definition.
(neck can mean rudeness or audacity)
'with' is the link.
(Other definitions for neck that I've seen before include "It's risky to stick it out" , "Canoodle; isthmus" , "top of bottle" , "Narrow part of body" , "One may get it in it!" .)