Check sieve again (8)
I believe the answer is:
restrain
I believe this clue is a double definition.
'check' is the first definition.
(I know that check is a more specific form of the action restrain)
'sieve again' is the second definition.
('strain' can be a synonym for 'sieve' so perhaps 'restrain' is OK for 'sieve again')
(Other definitions for restrain that I've seen before include "Stop" , "bottle up" , "Arrest - confine - subdue" , "Tie up - arrest" , "Manacle" .)