Don Juan mixed up 'Hair' and 'Loot' (8)
I believe the answer is:
lothario
'don juan' is the definition.
(thesaurus)
'mixed up hair and loot' is the wordplay.
'mixed up' is an anagram indicator.
'and' means one lot of letters go next to another (I've seen this in other clues).
'hair' put after 'loot' is 'loothair'.
'loothair' is an anagram of 'LOTHARIO'.
(Other definitions for lothario that I've seen before include "Don Juan-type character" , "Dissolute" , "Womanizser" , "A Gay libertine" , "Heartbreaker" .)