Investigators frisk politicians (6,5)

I believe the answer is:

search party

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'investigators frisk' is the definition.
'search party' can be an answer for 'frisk' (thesaurus). I'm not certain of the 'investigators' bit.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for search party that I've seen before include "hunters" , "seekers" , "Group looking for person or thing" , "Group seeking a lost person" .)

I've seen this clue in The Mirror.

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