How movies were once filmed on record (2,5,3,5)
I believe the answer is:
in black and white
'how movies were once filmed' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'record' is the wordplay.
I cannot really understand how this works, but
'record' could be 'hit' (I have seen 'Popular record ' mean 'hit' so perhaps 'record' could also mean 'hit') and 'hit' is present in the answer.
This may be the basis of clue (or it may be nonsense).
'on' acts as a link.
Can you help me to learn more?
(Other definitions for in black and white that I've seen before include "committed to paper" , "Most films are no longer" , "fundamentalist way of viewing things?" , "How extreme viewpoints are" , "explicit" .)