Cockie - in 31 Moravian is referring to a 3-letter word for "not" in Elgin rather than Brno; single letter for"opposing"; and another pronoun for "one".
Cockie, 31 is a 3 letter word followed by a single letter abbreviation and then a two letter word. I can't parse 28 as the soldier should be 6 letters, not 5.
Regarding the second sentence of the preamble: we are not told what to do with the added/removed letters in “some other clues’ answers” . Am I missing something?