welcome ganda
yes, two Is involved in 1d, plus standard crosswordese for "working" (i think - i don't have the clue in front of me).
11 backwards. beef animal inside mostly not mad
Thanks to Brendan and Chrise. Hadn't got the meaning of almost all there until explained, then it was obvious! I love the obliqueness of some of these clues.
Finished! What a slog - some brilliant clues, too many I had to look up and some I should have seen on first glance (like 7d, my LOI embarrassingly) . Thanks for all the hints, couldn't have done it otherwise.