Transfer cycling Geordie duo on the box (6)
I believe the answer is:
decant
'transfer' is the definition.
(to decant is to transfer to another container)
I don't understand the rest of the clue.
(Other definitions for decant that I've seen before include "Pour wine from one container to another to remove the sediment" , "Pour wine from bottle into table vessel" , "Pour off (liquid)" , "Pour wine from bottle to serving jug" , "Pour (wine) off lees" .)