I once let lunatic vote (8)

I believe the answer is:

election

'vote' is the definition.
(election is a kind of vote)

'i once let lunatic' is the wordplay.
'lunatic' indicates an anagram.
'i'+'once'+'let'='ioncelet'
'ioncelet' with letters rearranged gives 'ELECTION'.

(Other definitions for election that I've seen before include "Voting opportunity" , "Procedure for choosing government" , "Choice by vote" , "Competition by ballot" , "An act of democracy" .)

I've seen this clue in the Sydney Morning Herald.

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