Not even Democratic Party turned up (3)
I believe the answer is:
odd
'not even' is the definition.
('odd' is the opposite to 'even')
'democratic party turned up' is the wordplay.
'democratic' becomes 'd' (political abbreviation).
'party' becomes 'do' (do is a kind of party).
'turned up' is a reversal indicator.
'd'+'do'='ddo'
'ddo' written backwards gives 'ODD'.
(Other definitions for odd that I've seen before include "Peculiar in uneven way" , "Funny" , "Peculiar sort of number?" , "Not even - curious" , "Rum" .)