Detailed, thorough (2-5)

I think it could be either:

Which length description are you looking for?:

2-5

in-depth

I believe this clue is a double definition.

'detailed' is the first definition.
(I've seen this before)

'thorough' is the second definition.
(I've seen this before)

(Other definitions for in-depth that I've seen before include "Detailed and thorough" , "Profoundly (studied)" , "Thorough and intensive" , "Comprehensive and thorough" , "Detailed (investigation)" .)

I've seen this clue in The 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.