Take possession of girl with kiss (5)
I believe the answer is:
annex
'take possession of' is the definition.
(annexing is a kind of taking possession of)
'girl with kiss' is the wordplay.
'girl' becomes 'anne' (I've seen this before**).
'with' is a charade indicator (letters next to each other).
'kiss' becomes 'x'.
'anne'+'x'='ANNEX'
(Other definitions for annex that I've seen before include "Seize" , "Grab" , "Join - add" , "Appropriate" , "Add as an extra part" .)