All answers have a connection to royalty:
33 First to win The Oaks and the St Leger Stakes in the same year (5.2.6) - all I could find was mention of a horse called Eleanor!
7 Paul Temple was heralded by this (10.4) - found this but can't find a suitable answer
https://en.wikipedia.org/wiki/Paul_Temple
47 What links a bonnet,a special tartan and a pleasure ship operating cruises around Britain (8)
63 Along with the Custom House it lies between Royal Albert & Royal Victoria (6.6) - found this but it doesn't fit: King George V Dock
7 Covent Garden by another name (5.5.5) - found that it was CONVENT Garden - doesn't fit!!
74 Charlie was its captain (3.7.5)
77 What links the late Princess Margaret with Donna Lucia d’Alvadorez (8.4)