Biological map subject (6)
I believe the answer is:
genome
'biological map subject' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for genome that I've seen before include "blueprint for life" , "What specifies all characteristics" , "Complete set of individual's chromosomes" , "Full set of chromosomes of an individual" , "Complete set of genetic material in the cell of an organism" .)