Bloods in pop quartet? (4)
I believe the answer is:
abba
This might be a double definition.
'bloods in pop' is the first definition.
'abba' can be an answer for 'pop' (I have seen 'Biblical pop' mean 'abba' so perhaps 'pop' could also mean 'abba'). I am not certain of the 'bloods in' bit.
'quartet?' is the second definition.
(ABBA, pop band quartet)
Can you help me to learn more?
(Other definitions for abba that I've seen before include "6 24 113 [SCAN-DIN-AVIAN] band" , "rhymes in Petrarchan sonnet" , "Swedish pop band of the 1970s" , "Eurovision prizewinning Swedish pop group" , "Form of address to deity" .)