Party in American Quarter - the late place the Count frequents (6)
I believe the answer is:
coffin
'the late place the count frequents' is the definition.
I can't tell whether this defines the answer.
'party in american quarter' is the wordplay.
'party' becomes 'ff' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'american quarter' becomes 'coin' (I can't explain this - if you can you should give a lot more credence to this answer).
'ff' inserted inside 'coin' is 'COFFIN'.
Can you help me to learn more?
(Other definitions for coffin that I've seen before include "Corpse's chest" , "Casket for a corpse" , "Body box" , "Casket for the dead" , "Box for burial" .)