Leading pairs from rookie tag teams follow set order (6)
I believe the answer is:
rotate
'follow set order' is the definition.
(as in a job rotating amongst a group)
I don't understand the rest of the clue.
(Other definitions for rotate that I've seen before include "'Er, to a T? (anag)" , "Turn around as on axle or spit" , "Spin round" , "Alternate" , "Pivot" .)