House that you dared to enter finally (5)
I believe the answer is:
tudor
'house' is the definition.
(royal house)
'that you dared to enter finally' is the wordplay.
'finally' indicates one should take the final letters.
The last letters of 'that you dared to enter' are 'TUDOR'.
(Other definitions for tudor that I've seen before include "Owen's house" , "Relating to the English ruling family in the 1500s" , "Mary" , "Pre-Stuart royal house" , "Style of architecture in 15th c. England" .)