Man at church brought in by passenger vehicle — or tube (8)
I believe the answer is:
bronchus
'tube' is the definition.
(bronchus is a kind of tube)
'man at church brought in by passenger vehicle' is the wordplay.
'man' becomes 'ron' (I've seen this before**).
'at' is a charade indicator (letters next to each other).
'church' becomes 'ch' (common abbreviation).
'brought in by' means one lot of letters goes inside another.
'passenger vehicle' becomes 'bus' (I've seen this before).
'ron'+'ch'='ronch'
'ronch' going inside 'bus' is 'BRONCHUS'.
'or' is the link.
(Another definition for bronchus that I've seen is " tube".)