if the first two across are Quipster and Rude then where does Eyepiece (the answer to the ninth down clue) fit?
Also, do we need to put letters in all the squares or are there some blanks?
There are only 9 down answers starting from the top row - answers in columns 4,7 & 11 start lower down, so EYEPIECE does start from the end of RUDE in column 12 as Neveracrossword says.
There are no blank squares. The top row is -
QUIPSTERRULE (12 letters = 12 columns.
The second row has only one 9 letter word that starts from the 4th square in (1dn, 2dn & 3dn provide the letters in the first 3 squares, so no blank squares there either).