Thanks Lumen,
33 - Is a 4 letter "financial system" (it was also a word sometimes used to describe an unemployment benefit cheque, as in I'm waiting for my .....) around a single letter for "acceptable" (as coined by Nancy Mitford I learned recently) - definition is an "instrument".
37 - Is the first 4 letters of an 8 letter word/"halved" meaning "relations between states" (as carried out by people who work in the embassy?) + single letter for "November" - definition is "nucleus".
2 - A word meaning "relationship" (as in mathematics) with the i/"one" changed/"sacrificed" to a O/"nothing" - definition is "Javan ruler".
10 - 3 letters for "surrender" followed by 2 letters for "in enemy's head" - definition is "he pushed knife" (he actually has a knife named after him and it's also the name of a deceased British rock star who, were he still alive, would have celebrated his birthday last week).
17 - Single letter for "essence of seriously" + 4 letter word for "wise" - definition is "language" (a Native American one)
24 - 3 letter French/"Nancy's" word for "named" followed by "Eliot's" (the poet) initials/"introductory letters" - definition is an archaic/"forgotten" word meaning "poems".
PS> Other than the knife and language, I didn't know any of the words!