Hankir, for the purposes of the crossword the object is eight letters, formed by the letters not given in wordplay for some clues. If those are not entered, you have a void, the appropriate shape - I'd actually put them in, saw what they spelled out and then removed them. In another part of the grid, there is a similar rectangle, containing a more specific reference to the object. It's surrounded by details of where the object was found. You move the set of 8 letters from there into the void. You'll then have the 6 complete. You've got an error in 34 D - the 7's name appears completely.