Secure from Warsaw perhaps, a cosmetic item (4,6)
I believe the answer is:
nail polish
'a cosmetic item' is the definition.
(cosmetic item for decorating nails)
'secure from warsaw' is the wordplay.
'secure' becomes 'nail' (both can mean to apprehend or capture).
'from warsaw' becomes 'Polish' (Warsaw is the capital of Poland).
'nail'+'polish'='NAIL POLISH'
'perhaps' is the link.
(Other definitions for nail polish that I've seen before include "digital coverage" , "cosmetic" , "digital application" .)