Jazzgirl I also put O, in fact E never occurred to me until you pointed it out, but you make a valid point!
I don't usually complain about clues being to easy but some of the four-letter solutions were write-ins and hardly cryptic.
COD 13d which combined a smooth surface, clever wordplay and a word that I like to use, myself being of a certain age!
Was I the only one that needed a PDM to see the definition in 5d? I think I would have struggled without all the crossers.
All in all quite fun, it's a while since we have seen a spoonerism, I know this will please some but I rather miss them.