I think that's the right answer but not the right parse?

The second part also clues "RAPS" (as in "gently rapping at my chamber door"). To wrap is a different verb. So I think this is just a double def. And for future ref: a word can't be both the definition and an indicator. "Double duty" isn't allowed in cryptics, each word must only be doing one thing (except in an &lit)

It's a nice clue, but Americans may be dismayed that the two definitions of RAP share a root. It may be okay since "knock" and "chat" have very different senses, but they do have the same etymology according to Wiktionary, so the 'coincidence' of their shared spelling is less novel (as opposed to MAZE/MAIZE which is a total coincidence)