Fortune 500 boycotted by kids and London police (6)
I believe the answer is:
kismet
'fortune' is the definition.
(I've seen this in another clue)
'500 boycotted by kids and london police' is the wordplay.
I cannot really understand how this works, but
'police' could be 'met' (London Metropolitan Police) and 'met' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for kismet that I've seen before include "Will of Allah" , "Turkish fate, destiny" , "Destiny; 50s musical" , "Fate - 1953 musical" , "Broadway musical" .)