2010 ITV drama series starring Keeley Hawes as DSI Martha Lawson (8)

I believe the answer is:

identity

(Other definitions for identity that I've seen before include "A person's individuality" , "sort of card" , "it may precede crisis" , "Individuality providing recognition" , "Individuality or singularity" .)

I've seen this clue in The Independent.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.