House with unearthed sides in rocky hill (5)
I believe the answer is:
tudor
'house' is the definition.
(royal house)
'unearthed sides in rocky hill' is the wordplay.
'sides' means to remove the middle letters (only the letters on the sides are used).
'in' means one lot of letters goes inside another.
'rocky hill' becomes 'tor' (I've seen this in another clue).
'unearthed' with its centre removed is 'ud'.
'ud' inserted inside 'tor' is 'TUDOR'.
'with' is the link.
(Other definitions for tudor that I've seen before include "Style of architecture in 15th c. England" , "Of English C16" , "Member of royal family" , "A royal house of England" , "Dynasty's founder" .)