Thanks muraria.
Googled it and found the reference. Now to figure out what to replace.
As mentioned earlier, 12 letters have to be changed possibly in 25a.
Parsed 37d.
In 20d, what is the letter for Shakespeare? I have a 4 letter word or Long.
Long letter to Shakespeare (4)
In 28, what is the reference to inroads?
Are leaderless group about to make inroads? (3) A + (s)ET?
AET means aged.