Be unfavourable to have another shot (extremely skint) (2,7)

I believe the answer is:

go against

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'shot extremely skint' is the definition.
I can't judge whether this defines the answer.

'be unfavourable to have another' is the wordplay.
'be' becomes 'go' (going is a kind of being).
'unfavourable' becomes 'st' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'to have' is an insertion indicator.
'another' becomes 'again' (I've seen this before).
'go'+'st'='gost'
'gost' placed around 'again' is 'GO AGAINST'.

Can you help me to learn more?

(Other definitions for go against that I've seen before include "Resist" , "Oppose" , "Turn out unfavourably (for)" , "disadvantage" , "Counter" .)

I've seen this clue in The Sunday Times and The Times.

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