Did Elias Canetti approve of the 'in-joke'?

So, it turns out that

22 Across : Law, cheating it (anag) (5,8)

is just an anagram, and the solution - Wigan Athletic - has no obvious connection with illegal activity. That made it pretty plain that

15 Down : Knocking sound (3-3)

would be 'tat-tat' as in 'rat-a-tat-tat'. I was stumped by

12 Down : Celebration (8)

for an eternity or two, but I realised they wanted, as a solution to a different clue, not 'leitmotif', but rather 'leitmotiv', the v at the end of which meshed beautifully with the sixth letter of 'festival'.

Problem solved.