Hi Brendan
That was a very useful hint, which I got straight away, but meant neither of my two possible answers for 20d was correct. But I found a third word that fitted my letters and meant make an anagram, so I finished. I google it as Like most others, I'd never heard of it and I couldn't find it in the dictionary. I was able to tell my friend in Sheffield, with whom I share the crossword on Sunday mornings, that Brose and Bender were definitely wrong!