If this sounds patronising, I apologise in advance; it's not meant to be. Many Listener preambles merit very close scrutiny, especially those of the more complex puzzles. I have been doing The Listener crossword for about 4 years now, and in that time I've learnt to treat the wording of the preambles with the utmost respect. It's true that occasionally they are unintentionally misleading or ambiguous; in most cases they are well thought out and may contain key phrasing that can get you to the correct solution or help you to avoid an incorrect one. In this case the parenthetical clause refers to the 'correct description', not to the correct answers to the other unclued entries. If one has worked through even a small part of the puzzle one knows where this 'description' is entered. I must confess that at first I expected all the individual answers to the unclued entries to be different from the final collective solution, but when I re-read the preamble I realised that there was nothing there to imply this was the case.
I do not know whether my solution is correct, but the wording of the preamble helped me to resolve a perceived ambiguity that has nothing to do with any of the above.