Rebuke insane oaf with a leer that's nasty (1,4,2,4,3)
I believe the answer is:
a flea in ones ear
'rebuke' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'insane oaf with a leer that's nasty' is the wordplay.
'with' says to put letters next to each other.
'that's nasty' is an anagram indicator.
'insane'+'oaf'+'a'+'leer'='insaneoafaleer'
'insaneoafaleer' anagrammed gives 'A FLEA IN ONES EAR'.
Can you help me to learn more?
(Other definitions for a flea in ones ear that I've seen before include "Tom may have found irritating -" , "one that has jumped into the canal?" , "Rocket" , "Stinging rebuff (colloq.) (1,4,2,4,3)" , "Snub" .)