Guardian crossword is a first for me (father-in-law an avid reader and staying with us for a week!). Only thing I've looked at so far is the crossword. Not sure what that says about my politics?
Know Lie-in-King from regular searches for Sunday Telegraph crossword answers!
I give up! I expect to have a 100% logical explanation of cryptic clues otherwise I'm not happy. Don't think I'll be doing the Guardian crossword again. I'm a bit of a pedant I'm afraid.
Potholer is definitely the right answer (or, to be more exact, the required answer). The puzzle can be completed online at the Grauniad website and there's a 'cheat' button for all except the weekend prize puzzles.