Somewhat slowly, Clark uncovered poor sector of the city (9)
I believe the answer is:
larghetto
'somewhat slowly clark uncovered poor sector' is the definition.
I can't judge whether this defines the answer.
'of the city' is the wordplay.
I cannot really see how this works, but
'of' could be 'o' and 'o' is present in the answer.
an anagram of 'the' is 'het' which is present in the answer.
'city' could be 'la' (Los Angeles) and 'la' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for larghetto that I've seen before include "Slowish" , "Rather slow" , "movement" , "rather slowly" , "In a fairly slow tempo (>music)" .)