Greenish coin bearing six horses? (11)
I believe the answer is:
viridescent
'greenish' is the definition.
(I've seen this before)
'coin bearing six horses?' is the wordplay.
'coin' becomes 'cent' (cent is a kind of coin).
'bearing' says to put letters next to each other.
'six' becomes 'VI' (Roman numerals).
'horses?' becomes 'rides' (I am not sure about this - if you are sure you should believe this answer much more).
'vi'+'rides'='virides'
'cent' put after 'virides' is 'VIRIDESCENT'.
Can you help me to learn more?
(Another definition for viridescent that I've seen is " Greenish".)