Shot of heroin the boss of Hoskins sorted out (5)
I believe the answer is:
fixed
'sorted out' is the definition.
'fixed' can be an answer for 'sorted' (thesaurus). I'm unsure of the 'out' bit.
'shot of heroin the boss of hoskins' is the wordplay.
I cannot quite see how this works, but
'boss' could be 'ed' (short for editor - newspaper boss) and 'ed' is found in the answer.
'hoskins' could be 'i' (where the crossword setter is 'Hoskins') and 'i' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for fixed that I've seen before include "Securely fastened" , "Set" , "Established" , "Arranged" , "Repaired" .)