Plan is to be in temporary housing! (6)
I believe the answer is:
intent
'plan' is the definition.
(I've seen this in another clue)
'in temporary housing' is the wordplay.
'temporary housing' becomes 'tent' ().
'in'+'tent'='INTENT'
'is to be' acts as a link.
(Other definitions for intent that I've seen before include "With mind fixed on purpose, concentrated" , "Bent on, resolved" , "Concentrating on a particular purpose" , "Focused" , "Eager" .)