"Heat” director Michael (4)
I believe the answer is:
mann
'heat director michael' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for mann that I've seen before include "Thomas ---, wrote Death in Venice" , "Thomas -, Twentieth Century German author (Death in Venice)" , "Manfred --, 1960s pop band" , "German writer concerned with the role of the artist in society, d. 1955" , "Thomas -, Ger. author (Death in Venice)" .)