Careful investigation into a subject (8)

I believe the answer is:

research

(Other definitions for research that I've seen before include "Investigate through study" , "What may make you a doctor" , "Investigation designed to expand knowledge" , "university job" , "Scientific investigation" .)

I've seen this clue in the Irish Times (Simplex) and The Irish Times.

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.