Another question (sigh). There are 3 pairs of words starting with the same letters (Q, L and N). This tells us the positions of the 9 letter solutions beginning with L and N, and leaves 2 9 letter...
As far as I can see there are 3 clues with 9 letter answers (beginning with L, N, O) but spaces in the grid for 4. Similarly, there seem to be 7 clues with 7 letter answers (C, F, N, U, V, X, Y) but...