16 across
Party
accepts
1,000,000
deposit
(4)
Party accepts 1,000,000 deposit (4)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is deposit, as in to dump something somewhere. DUP (the Democratic Unionist Party, your "party") wraps around M (the Roman numeral for a million, hence "1,000,000") to give you DU(M)P.