Implement perhaps Friday party policy (9)
I believe the answer is:
mandoline
'implement perhaps' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'friday party policy' is the wordplay.
'friday' becomes 'man' (I can't explain this - if you can you should believe this answer much more).
'party' becomes 'do' (do is a kind of party).
'policy' becomes 'line' (I've seen this in other clues).
'man'+'do'+'line'='MANDOLINE'
Can you help me to learn more?
(Other definitions for mandoline that I've seen before include "Slicing tool" , "dicing with this?" .)