7d) Modern kind of thing maybe limits royal conflict (7-8) F?R?A?? ????????
16a) He's involved with people making security devices (9) P???????S
19a) He covers over diner to make room warmer (5,6) S???? ??????
21d) Miserly drunk (5) no letters
23a) Where to wash books that new university brought in (7) B??????
All help greatly appreciated.