Terribly excited to lose vote to fraud (6)
I believe the answer is:
deceit
'to fraud' is the definition.
(I've seen this before)
'terribly excited to lose vote' is the wordplay.
'terribly' indicates an anagram.
'to lose' suggests deleting specific letters.
'vote' becomes 'x' (how votes are marked).
'excited' with 'x' taken away is 'ecited'.
'ecited' with letters rearranged gives 'DECEIT'.
(Other definitions for deceit that I've seen before include "Subterfuge" , "Chicanery" , "Fraud or duplicity" , "Dishonest trick" , "Lying" .)