Love to wander about a royal house (6)
I believe the answer is:
orange
'a royal house' is the definition.
(I've seen this before)
'love to wander' is the wordplay.
'love' becomes 'o' (love means zero in tennis).
'to wander' becomes 'range' ('range' can be a synonym of 'wander').
'o'+'range'='ORANGE'
'about' acts as a link.
(Other definitions for orange that I've seen before include "Go near (anag) - fruit" , "A rainbow colour" , "Order of the North" , "Princely house" , "Between red and yellow on the spectrum" .)