One who draws tight item with holes? (8)

I believe the answer is:
strainer
'one who draws tight item with holes?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
This is the entire clue.
Can you help me to learn more?
(Other definitions for strainer that I've seen before include "one won't let everything go through" , "to keep out foreign bodies" , "one full of holes" , "Tea leaf catcher" , "eg Colander" .)
