The occasional cop's raid eradicates it (8)

I believe the answer is:

sporadic

I'm a little stuck... Click here to teach me more about this clue!

'the occasional' is the definition.
(I've seen this before)

'cop's raid eradicates it' is the wordplay.
'cop's raid' can be anagrammed to 'SPORADIC'.
But, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for sporadic that I've seen before include "Occurring here and there, like picadors" , "Occurring at irregular intervals" , "Having separate patches" , "Random" , "Occurring irregularly" .)

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