Confuse with combination of noise and dirt (9)
I believe the answer is:
disorient
'confuse' is the definition.
(disorienting is a kind of confusing)
'combination of noise and dirt' is the wordplay.
'combination of' indicates an anagram (I've seen this in other clues).
'and' is a charade indicator (letters next to each other) (I've seen this in other clues).
'noise' after 'dirt' is 'dirtnoise'.
'dirtnoise' is an anagram of 'DISORIENT'.
'with' acts as a link.
(Other definitions for disorient that I've seen before include "Puzzle" , "muddle" , "Get confused" , "confuse" .)