White House soldier going round facilities (5)
I believe the answer is:
igloo
'white house' is the definition.
(an igloo is white in colour)
'soldier going round facilities' is the wordplay.
'soldier' becomes 'GI' (GI can mean a US soldier).
'going round' says the letters should be written backwards.
'facilities' becomes 'loo' (I've seen this in other clues).
'gi' in reverse letter order is 'ig'.
'ig'+'loo'='IGLOO'
(Other definitions for igloo that I've seen before include "cold accommodation" , "Snow-house" , "Dome-shaped dwelling" , "series of chilly blocks" , "Ice-block construction" .)