Bakers can use these good sieves (8)
I believe the answer is:
griddles
'bakers can use these' is the definition.
(a baker might use a griddle)
'good sieves' is the wordplay.
'good' becomes 'g' (abbreviation).
'sieves' becomes 'riddles' (riddle is a kind of sieve).
'g'+'riddles'='GRIDDLES'
(Other definitions for griddles that I've seen before include "What cooks use" , "Does some waffling" .)