After you have clicked in the "Enter Your Question Title Here" and typed in a suitable title then click in the box that says "Enter Further Question Details Here..." and you'll be able to type into that box, and that is where you can give the full clue together with the number of letters required (if known).
In the meantime, for this one you can just type the missing information now by replying to your own question. Good luck for next time. Until the last few posts you managed to post questions with full details so I'm not sure what's going wrong now.