12 across: Bestial one covering uni garbage to follow 16-down (cockylora) (7, 7)
Even though the answer to 16-down, cockylora, is a playground game I had never heard of, it is not a word I particularly care to know, so I’ve not bothered to put it into the DA Teachings category. What I do want to know, though, is how the answer to this clue could be british bulldog.
17 across: Sort of market subterfuge? Beg off graft (7)
I can understand why sort of market subterfuge = futures. How beg off graft = futures is beyond me, though.
19 down: Shortly back-ordered links to simple songs (7)
Links = ties and simple songs = ditties, but how does shortly back-ordered = dit?