RU sorted out with flea for this? (6)
I believe the answer is:
earful
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'ru sorted out with flea' is the wordplay.
'sorted out with' indicates an anagram.
'ru' mixed up with 'flea' can make 'EARFUL'.
'for' acts as a link.
(Other definitions for earful that I've seen before include "Prolonged and angry reprimand" , "Large amount of verbal abuse" , "Severe reprimand" , "load of wax, possibly" , "harangue" .)