A pointer, maybe, as to what to do with a plot (5)
I believe the answer is:
digit
'plot' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for digit that I've seen before include "Finger; number" , "Finger; numeral" , "A small number" , "One in ten, say" , "that's on hand" .)