Changed side for Lord's is fully updated (8,2)
I believe the answer is:
switched on
'fully updated' is the definition.
(switched-on can mean fully informed)
'changed side for lord's' is the wordplay.
'changed' becomes 'switched' (switching is a kind of changing).
'side for lord's' becomes 'on' (side in cricket - Lord's is a cricket ground).
'switched'+'on'='SWITCHED-ON'
'is' acts as a link.
(Other definitions for switched on that I've seen before include "Up to date" , "Emotionally aroused" , "Alert" , "with electricity supply?" , "Illuminated" .)