Lead piping over new houses (6)
I believe the answer is:
govern
'lead' is the definition.
(thesaurus)
'piping over new houses' is the wordplay.
'houses' indicates a hidden word (part of the clue houses the answer).
'GOVERN' is hidden within 'piping over new'.
(Other definitions for govern that I've seen before include "Rule or administer" , "'Rule over, control (6)'" , "Be in power" , "Rule with authority, perhaps a country" , "Control, determine" .)