Boy wizard too much wrapped up in short hair style (6)
I believe the answer is:
potter
'boy wizard' is the definition.
(Harry Potter)
'too much wrapped up in short hair style' is the wordplay.
'too much' becomes 'ott' (short for 'over the top' - informal British).
'wrapped up in' means one lot of letters goes inside another.
'short' means to remove the last letter.
'hair style' becomes 'perm' (I've seen this before).
'perm' with its final letter removed is 'per'.
'ott' inserted into 'per' is 'POTTER'.
(Other definitions for potter that I've seen before include "Worker in ceramics - move aimlessly" , "Dabble; dawdle" , "Ceramic worker" , "Pootle" , "Maker of earthenware vessels" .)