22 down
Sanction
over
Eton
excluding
outsiders
(4)
Sanction over Eton excluding outsiders (4)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Sanction — a veto being the power to block legislation. For the wordplay, strip the outsiders (the outer letters) from over, which leaves you with VE, then do the same to Eton, leaving TO, and put the two together.