State calls for end of free vote petition (7)

I believe the answer is:
express
'state' is the definition.
(synonyms)
'end of free vote petition' is the wordplay.
'end of' says to take the final letters.
'vote' becomes 'x' (how votes are marked).
'petition' becomes 'press' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The final letter of 'free' is 'e'.
'e'+'x'+'press'='EXPRESS'
'calls for' is the link.
Can you help me to learn more?
(Other definitions for express that I've seen before include "Intimate - squeeze out" , "Transport" , "air" , "Verbalise - train" , "Explicit" .)
