As usual, I have the answers but need help understanding some of them.
15 down. Ocean said to be in bishop's turf. Answer is sea. What the heck has this got to do with bishop's turf?
7 down. Seed can be distributed and surrounded. Answer is encased. Anagram of 'seed can'. Is 'distributed' another of these cryptic clue codes for anagram?
12 across. Tour, looking back, a shocking defeat. Answer is rout. Obviously an anagram - why 'looking back'?
5 across, picture clue. An amplifier, a globe with an arrow pointing to the Arctic and the letter 'z'. Clue is 'They're very current'. Answer 'amperes'. Self explanatory except how do we get the sound 'air' from the globe. (Appreciate you can't see the pictures).