Planet with a revolution following Sun (6)
I believe the answer is:
saturn
'planet' is the definition.
(Saturn is an example)
'a revolution following sun' is the wordplay.
'revolution' becomes 'turn' (I've seen this before).
'following' says to put letters next to each other.
'sun' becomes 's'.
'a'+'turn'='aturn'
'aturn' put after 's' is 'SATURN'.
'with' acts as a link.
(Other definitions for saturn that I've seen before include "orbits the sun" , "The second largest planet" , "Planet with concentric rings" , "Titan its moon" , "Nearest ringed planet" .)