God sees ill-advised violent assailant at first being primed by head of state (4)

'god' is the definition.
(Siva is an example)

'first being primed by head of state' is the wordplay.
'first' becomes 'i' (I in Roman numerals eg Elizabeth I).
'being primed' becomes 'va' (I can't justify this - if you can you should believe this answer much more).
'by' is a charade indicator (letters next to each other).
'head of' says to take the initial letters.
The first letter of 'state' is 's'.
'i'+'va'='iva'
'iva' after 's' is 'SIVA'.

'sees ill-advised violent assailant at' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?