Type of flag (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
banner
'type of flag' is the definition.
This is the entire clue.
(Other definitions for banner that I've seen before include "One not allowing" , "Streamer for Clare" , "One prohibiting - flag" , "Flag with a slogan" , "It may be seen on demo" .)