Possible Clues:

• Satellite Iran is attaching to tail of rocket, one sending up others
• Swift, notably
• Artist is to become a writer
• That's one start about one that makes fun of it
• Artist is portrayed as one producing the ridiculous
• Cook, perhaps, posed with flag on roof of theatre
• eg Orwell, Swift
• To the scruffy artist, one's introduced as a writer
• There was seated the blooming girl making ridiculous fun before tea (8)
• Juvenal, for one