Missing 4, all south east:
25d Setter gets up before noon on principle (5)
I have --g--
20d Made weaker when swollen heart transplanted (7)
I have d---t--
24a Racketeer has nothing left (5)
Tools
I have n----
29a Dictate a request (6)
I have -e----
I think that one's "behest" but I'm not confident enough to put it in because it doesn't help me solve 20d.
All help appreciated.