OK. I should never have said that bit about easy clues! Can't bear not to complete the special edition, so must (reluctantly) ask for help with -
1a "J1000, containing message at end - one from lover of [champagne]" JO T-I-E
23a "extra fat cod in net" A-T-R -A-
40a "Central Asian touch at start of Jumbo 1000" T-D-I-
Here's to the next thousand!