Emit a fug perhaps and use it to disinfect (8)
I believe the answer is:
fumigate
'to disinfect' is the definition.
(thesaurus)
'emit a fug perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'emit'+'a'+'fug'='emitafug'
'emitafug' with letters rearranged gives 'FUMIGATE'.
'and use it' is the link.
(Other definitions for fumigate that I've seen before include "Treat (pests) with vapour" , "Disinfect using smoke or gas" , "Kill with, eg, smoke" .)