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

I believe the answer is:

go against

I'm a little stuck... Click here to teach me more about this clue!

'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 Times and The Sunday Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.