I agree with you on the usage of "started"; people who aren't like you and me wouldn't be aware of the alternate meanings.

As for "intelligence"? It depends on the audience--e.g. if you're dealing with children or targeting teens--but given the popularity of spy movies and such? I think most people would figure out you were using the word in the espionage-related meaning.

Plus, it's kind of a funny kick in the head when you read further on and go: "oh, they meant THAT meaning of that word."