Antiseptic (6)
'antiseptic' is the definition.
(associated in meaning)
This is the entire clue.
(Other definitions for sterile that I've seen before include "Unable to have offspring" , "Free from bacteria" , "Bacteria-free" , "unable to reproduce results" , "Fruitless" .)
'antiseptic' is the definition.
(iodine is a kind of antiseptic)
This is all the clue.
(Other definitions for iodine that I've seen before include "Antiseptic made from seaweed" , "Element used in medicine, photography and dyes" , "Infamous tablets in case of a nuclear emergency" , "Element, atomic number 53" , "Antiseptic found in seaweed" .)