What kestrels will do to keep egg clean? (6)
I believe the answer is:
hoover
'clean?' is the definition.
(hoovering is a kind of cleaning)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for hoover that I've seen before include "US president, 1929-33" , "J Edgar ...... was FBI boss." , "US president in House throughout" , "Clean with vacuum cleaner" , "Former president of US and vacuum cleaner" .)