Travel document carried by Chekhov is auctioned (4)
I believe the answer is:
visa
'travel document' is the definition.
(I've seen this before)
'carried by chekhov is auctioned' is the wordplay.
'carried by' indicates the answer is hidden within the clue.
'VISA' is hidden within 'chekhov is auctioned'.
(Other definitions for visa that I've seen before include "Endorsement allowing bearer to enter country" , "Travel document is required to enter Virginia" , "Authorisation to enter a country" , "travel authority" , "It allows the bearer to enter the country issuing it" .)