Maureen is on phone -- somewhere for overnight stay needed (5)
I believe the answer is:
motel
'somewhere for overnight stay needed' is the definition.
(place to stay overnight)
'maureen is on phone' is the wordplay.
'maureen' becomes 'Mo' (short for Maureen).
'is on' is a charade indicator (letters next to each other).
'phone' becomes 'tel' (short for telephone).
'mo'+'tel'='MOTEL'
(Other definitions for motel that I've seen before include "place for the rest of the travellers" , "Commercial accommodation" , "Drivers' accommodation" , "Drive-in accommodation" , "for board and lodging?" .)