Roam aimlessly around new house (5)
I believe the answer is:
manor
'house' is the definition.
(manor is a kind of house)
'roam aimlessly around new' is the wordplay.
'aimlessly' indicates an anagram (the letters rearranged chaotically or aimlessly).
'around' means one lot of letters goes inside another.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'roam' anagrammed gives 'maor'.
'maor' enclosing 'n' is 'MANOR'.
(Other definitions for manor that I've seen before include "lord's home" , "Country seat" , "Operational base" , "Large country house for Roman" , "Grand country house" .)