I understand how the 5-letter word completes the set and it clearly fits the cryptic clue derived from the extra words. However, as I see it, the metaphorical container is defined by words 4-7 of the complete quotation - the closed curve depicts those same 4 words. How does the 5-letter word represent an item from that container? The metaphorical container contains word 7, right?
Further, the instruction says "a film quotation describing the
selection" The selection is the 5-letter word - how does the quotation describe it?
Unless there is some obscure definition or brand name associated with the 5-letter word, then I don't think this all works.
Still it's a rewarding, timely and very tough Listener.