Feeling of guilt about detective (7)

I believe the answer is:

remorse

'feeling of guilt' is the definition.
(remorse is a feeling of regret or guilt)

'about detective' is the wordplay.
'about' becomes 're' ('re' means regarding or about).
'detective' becomes 'morse' (Inspector Morse, fictional detective).
're'+'morse'='REMORSE'

(Other definitions for remorse that I've seen before include "Sorrow for wrong committed" , "A feeling of deep regret" , "Bitter regret" , "Feeling of guilt" , "Compunction" .)

I've seen this clue in The Guardian.

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.