Hang about looking black (5)
I believe the answer is:
tarry
This might be a double definition.
'hang about' is the first definition.
(I've seen this before)
'looking black' is the second definition.
'tarry' can be an answer for 'black' (thesaurus). I am unsure of the 'looking' bit.
Can you help me to learn more?
(Other definitions for tarry that I've seen before include "Dawdle" , "'Delay, linger (5)'" , "covered with dark liquid" , "Leave very slowly" , "perhaps not to split" .)