I cede grim arrangement for cleaner (9)
I believe the answer is:
germicide
'cleaner' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'i cede grim arrangement' is the wordplay.
'arrangement' indicates anagramming the letters.
'i'+'cede'+'grim'='icedegrim'
'icedegrim' anagrammed gives 'GERMICIDE'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for germicide that I've seen before include "Substance destroying harmful microorganisms" , "Agent that destroys disease-carrying microorganisms" , "Disinfectant" , "antiseptic" .)