Maybe gather tight trousers for director (8)
I believe the answer is:
truffaut
'for director' is the definition.
(Francois Truffaut, 1932-1984)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for truffaut that I've seen before include "Filmmaker" , "film director" , "Franois -, French film producer" .)