Random few one's found in East London area that's swinging (4-8)
I believe the answer is:
wife-swapping
'swinging' is the definition.
(I know that wife-swapping is a type of swinging)
'random few one's found in east london area' is the wordplay.
'random' indicates an anagram.
'one' becomes 'i' (Roman numeral).
'found in east london area' becomes 'swapping' (I am not sure about this - if you are sure you should believe this answer much more).
'few'+'i'='fewi'
'fewi' with letters rearranged gives 'wife'.
'wife'+'swapping'='WIFE-SWAPPING'
'that's' is the link.
Can you help me to learn more?
(Other definitions for wife-swapping that I've seen before include "Practice of exchanging partners" , "Exchange of partners" .)