I found a lot of the clues very hard to crack, some of them not far off the level of Shark or Sabre. Home and dry now, but as murky has pointed out, the setter used the unusual 4, 5 entry in another puzzle published not long ago (in The Magpie). A sixth sense told me to watch out for it.
Having had his first Listener puzzle less than four years ago, Harribobs has become a dependable creator of astonishing final grids.