Setter upset about communist having such acceptability? (6,4)
I believe the answer is:
street cred
'having such acceptability?' is the definition.
I can't tell whether this definition defines the answer.
'setter upset about communist' is the wordplay.
'upset' is an anagram indicator.
'about' becomes 'c' (abbreviation for 'circa'**).
'communist' becomes 'red' (red is a kind of communist).
'setter' anagrammed gives 'street'.
'street'+'c'+'red'='STREET CRED'
Can you help me to learn more?
(Other definitions for street cred that I've seen before include "Acceptability amongst the "with it" young" , "Smartness" , "status in the city - with 12a" , "Social acceptance by young townies (slang)" , "rapport with the people?" .)