State support for chief and Troy leaders- Achilles, Idomeneus, Nestor (8)

I believe the answer is:

maintain

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'state support' is the definition.
'maintain' can be an answer for 'state' (I've seen this before). I'm not sure about the 'support' bit.

'chief and troy leaders-achilles idomeneus nestor' is the wordplay.
'chief' becomes 'main' (I've seen this before).
'and' is a charade indicator (letters next to each other).
'troy' becomes 't'.
'leaders' indicates taking the first letters.
The first letters of 'achilles idomeneus nestor' is 'ain'.
'main'+'t'+'ain'='MAINTAIN'

'for' acts as a link.

Can you help me to learn more?

(Other definitions for maintain that I've seen before include "Keep up - carry on" , "Keep going" , "Keep (at the same level)" , "Keep in existence or in repair" , "Keep - support" .)

I've seen this clue in the Irish Times.

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