Card game modelled after patience originally having no competitors (9)
I believe the answer is:
unopposed
'having no competitors' is the definition.
I can't judge whether this defines the answer.
'card game modelled after patience originally' is the wordplay.
'card game' becomes 'uno' (I've seen this before).
'modelled' becomes 'posed' (model and pose are synonyms).
'after' says to put letters next to each other.
'originally' suggests taking the first letters.
The first letter of 'patience' is 'p'.
'posed' put after 'p' is 'pposed'.
'uno'+'pposed'='UNOPPOSED'
Can you help me to learn more?
(Other definitions for unopposed that I've seen before include "without query" , "Not challenged" , "Assembly" , "Elected . . . . . . . . .; no other candidate" , "Nem con" .)