Q: Write down the letter C. Beneath that write ENT. And beneath that write a G. What profession do these letters represent? Here's a hint: It's a two-word phrase — 10 letters in the first word, 5 letters in the second.I believe the operative word is "write".
Edit: Actually the operative word is "operative" :)
A: Under C, Over a G, ENT --> UNDERCOVER AGENT
P.S. If anyone is interested, an almost identical version of the puzzle was played on-air about 10 years ago.