Dear missmolly43
I think that people may not have answered this query yet as you've given the question in the title! The normal practice is to put a title (e.g 'All about London quiz' in the title box and then your question or clue (giving number of letters) in the box below.
No. 24 Footballers magazine = Arsenal. (They are known as the 'Gunners' - and in the military sense an arsenal can be a magazine (storage for ammunition).
Hope this helps.