A race to ride away, dressed (7)
I believe the answer is:
attired
'dressed' is the definition.
(attiring is a kind of dressing)
'a race to ride away' is the wordplay.
'race' becomes 'tt'.
'to' is a charade indicator (letters next to each other).
'away' is an anagram indicator (letters move away from their original places).
'ride' with letters rearranged gives 'ired'.
'a'+'tt'+'ired'='ATTIRED'
(Other definitions for attired that I've seen before include "surrounded by duds" , "got up" , "Wearing clothes" , "Turned out" , "Dressed or clothed" .)