Passenger has caught the absurdity (5)
I believe the answer is:
farce
'absurdity' is the definition.
(I've seen this in another clue)
'passenger has caught' is the wordplay.
'passenger' becomes 'fare' (fare is a kind of passenger).
'has' means one lot of letters goes inside another.
'caught' becomes 'c' (cricket abbreviation).
'fare' enclosing 'c' is 'FARCE'.
'the' acts as a link.
(Other definitions for farce that I've seen before include "Forcemeat" , "eg 'Noises Off'" , "Ludicrous stage show" , "Absurd proceedings, perhaps in play" , "Absurd event; comedy" .)