Film-maker never supported by network (5)
I believe the answer is:
nolan
'film-maker' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'never supported by network' is the wordplay.
'never' becomes 'no' (I've seen this in other clues).
'supported by' means one lot of letters go next to another (in a down clue, some letters hold up others).
'network' becomes 'lan' (Local Area Network).
'no'+'lan'='NOLAN'
Can you help me to learn more?
(Other definitions for nolan that I've seen before include "Film director - singing sisters" , "Sir Sidney - - , Australian painter" .)