11a - I'd say both teenieleek and manu have suggested valid wordplays. It was driving me hopping mad thinking of one.
Regarding 21a, I agree that the answer is a 9, with "hung drawn" being the major cryptic element. But where is the definition?
The alternative is to take the first 8 words as the definition but then you need to insert more than 20 9 into the anagram of the last word.
Any thoughts?