Special card for one to run round with (5)
I believe the answer is:
tarot
'round with' is the definition.
The definition suggests a singular noun which matches the answer.
'special card for one to run' is the wordplay.
'special card for' becomes 'tar' (I can't justify this - if you can you should believe this answer much more).
'run' is an anagram indicator.
'to' anagrammed gives 'ot'.
'tar'+'ot'='TAROT'
Can you help me to learn more?
(Other definitions for tarot that I've seen before include "Pack of cards used in fortune-telling" , "Method of fortune-telling" , "Fortune-teller's pack of cards" , "one may have been taken from deck" , "Sort of card" .)