24a One who was not born to rule (7) O?????R
26a Maria ran out for sauce (8) M???????
14d Space traveller embracing redhead is a fool (5) M???N
18d Not be blusterous when shining (8) L?S?????
28a Caribou controlled we hear at all times (8)
20d Pup Derek treated recovered energy (6 2) P??????P
21d chap to get on with Romeo the boss (7) ?A????R
Thank you for your help I have managed to get
26a Marinara
24a The O was wrong and should have been a U which made it Usurper
21d I think is manager but I'm not sure why
Just left with 16a Register one stone I have Lo?an and can only think of Logan but again don't why