I agree Gitto, some of the statements/quotes for Listener puzzles seem to be more obscure nowadays : perhaps this is because setters now assume that solvers are going to use the internet. But intricate google searches aren't really anything to do with crossword puzzles. One might just as well add a general knowledge quiz at the end of the puzzle, just for good measure...
Hi Dryden, the printed clue is "Tree debarked and chopped down when imbibing top-class port tanked up" In this case port is the word that must be removed, and does not provide an 'M'.