Veto about to stick! (5)
I believe the answer is:
baton
'stick' is the definition.
(term for a stick or staff)
'veto about to' is the wordplay.
'veto' becomes 'ban' (banning is a kind of vetoing).
'about' indicates putting letters inside.
'ban' enclosing 'to' is 'BATON'.
(Other definitions for baton that I've seen before include "Club, stick" , "Short stick" , "Police (or conductor's) stick" , "A stick for a conductor and policeman" , "Stick passed in relay races" .)