Temporary accommodation, rain’s pouring in (9)
I believe the answer is:
transient
'temporary' is the definition.
(similar in meaning)
'accommodation rain's pouring in' is the wordplay.
'accommodation' indicates anagramming the letters.
'pouring' becomes 'tent' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'rains' is an anagram of 'ransi'.
'ransi' placed within 'tent' is 'TRANSIENT'.
Can you help me to learn more?
(Other definitions for transient that I've seen before include "gone in a trice!" , "on the move" , "Lasting a short time" , "Fleeting" , "Here today, gone tomorrow" .)