Can someone please clear up 20ac for me? It looks like it should be an anagram of "subtler if", but the answer I've got requires an extra "i". Where does the missing "i" come from?
Peterm = rather loose, I thought. Chambers says that one of the meanings of "remember" is to bear in mind as deserving of a tip, or gratitude. Loosely bequeath? And sapper - member of the RE.
I think with the concept of "remember me in your will", the question mark at the end, and the crossing letters, the clue, although not the best in this puzzle, holds up.