malone
I am glad to say I have finished it -thank you to all who gave hints.
I agree with MM about the messy pre-amble, and I am told that the relevant surname is a 2 word one (no hyphen). I think it should have been mentioned that not all the surname was needed.
All this double -barrelled, either hyphenated or not, is confusing, but I too did not waste much time looking for the missing part. Incidently a friend of mine, Ann Marie, insists that she has one Christian name, though without a hyphen. Officialdom always treats her as Mrs A. M. X. She refuses to provide an initial on forms etc. and uses her full Christian name.
I also did not enjoy this EV. I did not parse all the clues so did not get the prize - Blister Ball ? And why do they "stand in the way"? I thought they helped entrants.