detektivka

1. (of a woman) detective (female)
   Glavna junakinja serije je mlada detektivka iz Beograda. — The main character of the series is a young detective from Belgrade.
2. Croat. colloq. (of a book, film) detective novel; detective film
   Na plaži je čitala neku detektivku. — On the beach she was reading some detective novel.

In the sense 'detective novel, film' the word is Croatian usage. In Serbia: krimić, detektivski / kriminalistički roman; for a film, krimić or detektivski / kriminalistički film.