Crossword Genius

Marked card (6)

Ross

I believe the answer is:

ticket

I'm a little stuck... Click here to teach me more about this clue!

'card' is the definition.
(thesaurus)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for ticket that I've seen before include "Coupon, admission voucher" , "Token for admission" , "Parking offence notice" , "Maybe single" , "Entry/travel permit" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app