Current cycle trail, scintillating (10)
I believe the answer is:
iridescent
'scintillating' is the definition.
(both can mean shining or glittering)
'current cycle trail' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'cycle' becomes 'ride' (ride can mean to ride a bike).
'trail' becomes 'scent' (an animal's trail is its scent).
'i'+'ride'+'scent'='IRIDESCENT'
(Other definitions for iridescent that I've seen before include "Showing luminous colours" , "with a glittering display" , "Sparkling" , "shot" , "Shimmering with rainbow colours (anag of 1 across, 9 and 23)" .)