Still time to ride competitively (5)
I believe the answer is:
event
'ride competitively' is the definition.
(I've seen this before)
'still time' is the wordplay.
'still' becomes 'even' (synonyms).
'time' becomes 't' (abbreviation).
'even'+'t'='EVENT'
'to' acts as a link.
(Other definitions for event that I've seen before include "Occurence, occasion" , "heat, perhaps" , "Something going on" , "pole vault maybe" , "special occasion" .)