Completed six deliveries (4)
I believe the answer is:
over
I believe this is a double definition.
'completed' is the first definition.
(synonyms)
'six deliveries' is the second definition.
(a cricket over consists of six deliveries)
(Other definitions for over that I've seen before include "Directly above" , "left for another day?" , "Six balls in cricket" , "superior position" , "Finished; six balls" .)