Run into room, access being organised (4,6)
I believe the answer is:
come across
'run into' is the definition.
(synonyms)
'room access being organised' is the wordplay.
'being organised' is an anagram indicator.
'room'+'access'='roomaccess'
'roomaccess' is an anagram of 'COME ACROSS'.
(Other definitions for come across that I've seen before include "Be perceived as" , "provide what is expected" , "Find accidentally - provide what is necessary" .)