Move across to the referee standing by (8)
I believe the answer is:
transfer
'move across' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for transfer that I've seen before include "Move, change (to new place)" , "player's move" , "Give over!" , "Footballer maybe" , "Move something from one place to another" .)