Hustle poor detective (6)
I believe the answer is:
sleuth
'detective' is the definition.
(I know that sleuth is a type of detective)
'hustle poor' is the wordplay.
'poor' is an anagram indicator.
'hustle' is an anagram of 'SLEUTH'.
(Other definitions for sleuth that I've seen before include "Olivier/Caine film" , "Bloodhound" , "Hustle for a clever detective like Sherlock" , "Gumshoe" , "Hustle (anag)" .)