Place kiss on girl's chest (6)
I believe the answer is:
thorax
'girl's chest' is the definition.
'thorax' can be an answer for 'chest' (synonyms). I'm not certain of the 'girl's' bit.
'place kiss on' is the wordplay.
'place' becomes 'thora' (I can't explain this - if you can you should believe this answer much more).
'kiss' becomes 'x' (X can represent a kiss).
'on' says to put letters next to each other.
'thora'+'x'='THORAX'
Can you help me to learn more?
(Other definitions for thorax that I've seen before include "Part of the body containing 3" , "Between the neck and belly" , "Part of the body between the head and abdomen" , "Part of the human torso between neck and diaphragm" , "Chest" .)