Overturning umpire’s decision finally with know-how on movement (8)
I believe the answer is:
transfer
'movement' is the definition.
(transfer is a kind of movement)
'overturning umpire's decision finally with know-how' is the wordplay.
'overturning' is a reversal indicator.
'umpire's' becomes 'refs'.
'finally' suggests the final letters.
'with' means one lot of letters go next to another.
'know how' becomes 'art' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The final letter of 'decision' is 'n'.
'refs'+'n'+'art'='refsnart'
'refsnart' reversed gives 'TRANSFER'.
'on' is the link.
Can you help me to learn more?
(Other definitions for transfer that I've seen before include "Move football clubs" , "Make over (property to another)" , "Footballer maybe" , "handover" , "Move (something) across" .)