Mark, comedian, probable loser? (11)

I believe the answer is:

scratchcard

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'probable loser?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'mark comedian' is the wordplay.
'mark' becomes 'scratch' (synonyms).
'comedian' becomes 'card' (card can mean a humorous person).
'scratch'+'card'='SCRATCHCARD'

Can you help me to learn more?

(Other definitions for scratchcard that I've seen before include "Ticket for instant lottery" , "Rubbed lottery ticket" , "Gambler's investment rubbed with a coin" , "form of lottery" .)

I've seen this clue in The Telegraph.

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