7 D A double definition (and Mufti, the legal expert, appears quite often in puzzles.)
11 Rule is the order, ETC, etcetera, the other things and I, in the clue go inside that (are stuffed)
26. is another obscurity, here’s the Chambers entry…
helpˈmate (noun)
(a modification of helpˈmeet, itself formed from the phrase in the Bible (Genesis 2.18), ‘an help meet for him’) a helper, specif a wife
5a there's a book by the brothers Grossmith called "Diary of a nobody", and a poor wine might have NO BODY
21 how old is this puzzle? I don't think anyone would define ETHNIC as "African" nowadays!