[Mnemosyne]

7. is, I'm afraid, wrong. The clue is cryptic even if it's only two words.

5., however, is right on the money.

Mugwump, please do join me in corruption! We have a lovely old time here, I assure you.



ETA: And, Mith, if by "different cryptic conventions," you mean "the U.S. has no cryptic conventions" you're about right. Yes, I've read up on the stuff on wikipedia, and apparently there are different rules for the cryptics that we do have; but almost no one in the States (at least, the Midwest) knows what you're talking about when you mention "cryptic crosswords" or "cryptic anything." About the closest we ever get are the clues in our conventional crosswords that end in question marks.