17D. Working during male party one day in Berlin, I dreamt about head waiter (4,3;6,1)
Spoiler alert (please don't put solutions down at this stage)
I got these too but I don't think sonntag is right. Working out the across/down instruction to alternate the letters added, it should mean that T goes in to the anagram not N. And the solution is 4,3 so must be another word...