Machine husband’s left running in the Odeon, for example? (6)
I believe the answer is:
cinema
'the odeon for example?' is the definition.
(Odeon is a chain of cinemas)
'machine husband's left running' is the wordplay.
'husband' becomes 'h'.
'left' suggests deleting specific letters.
'running' indicates anagramming the letters.
'machine' with 'h' removed is 'macine'.
'macine' with letters rearranged gives 'CINEMA'.
'in' acts as a link.
(Other definitions for cinema that I've seen before include "Movie-house" , "Picture house" , "The big screen" , "Where films are shown" , "Modern art" .)