Though I've finished the bottom, I only have one in the top half (and I'm not positive about that!). Perhaps a hint on 1ac would get me restarted
Bets involving first three rugby scores without backing record (7)
No letters, obviously!
TIA
Thanks AB - I have an answer, thanks to you. I'm not sure that the compiler has it right, though - when I worked in a bookies (during summer vacations), they were called "trebles".
Inspiration still not striking. A hint for 5ac perhaps?
Rule around edge of pavement, mostly for pedestrian (6)
I have ???D?R, though both of the letters are rather speculative.
TIA