Refer to plot, by the sound of things (4)
I believe the answer is:
cite
'refer to' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for cite that I've seen before include "Quote (a reference)" , "Quote (an author)" , "Quote (eg, a book)" , "Mention as example or quote" , "Give as an example" .)