"Roger” follower (5)
I believe the answer is:
wilco
'roger follower' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for wilco that I've seen before include "expression of agreement" , "it indicated acquiescence" , "Radio comms expression of compliance" , "Agreed (radio comms)" , "Term of agreement (in radio communication)" .)