hi Johnson,
22d - Is a double definition - the first is a cryptic/humorous reference to "order student" (remember the use of "she") - for the 2nd definition, "what she claims to possess" , you need the read the answer as 2, 4
28a - 3 letter "article" inside/"penned by" 4 letter "humorous writer" (a specific one) - definition is "hide" both as a verb and a noun.
Your letters are correct (Ps. It's better to use ? for missing letters rather than - as they can be a bit difficult to read)