Colander, sieve (8)
I believe the answer is:
strainer
This clue is a double definition.
'colander' is the first definition.
(I've seen this before)
'sieve' is the second definition.
(I've seen this before)
(Other definitions for strainer that I've seen before include "Filter, sieve" , "Sieve, colander, etc" , "One trying very hard" , "who tries really hard?" , "eg Colander" .)