Politicians do (5)
I believe the answer is:
party
'do' is the definition.
(I've seen this in another clue)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for party that I've seen before include "Crew" , "Celebratory social gathering" , "See 22" , "push the boat out" , "Festivity" .)