I don't know if I've gone wrong with this.
For 11A I have most 'rungs of the ladder' but my first one doesn't fit at all with 6D which looks right and puts 'B' as the 3rd letter.
Is the 'B' right?
Clue = The most reliable use dagger in case (8). Don't give the answer away - just tell me if it's ---B---- as I think it is, and does that fit with your 1-letter change from 'head'? Thanks.
1A also doesn't fit with my 2D which puts a 'P' as the 2nd letter of 1A.
2D: Player circulating like this woodlouse (6) - again, no answers, please, just is the first letter a 'P'?
Also, if anyone can give me a hint on 18A 'poison', e.g. which letter changes or another definition, and the same for 26A 'stars', that would be much appreciated, as I have the rest of those 'ladders'.
Don't give away the theme!