Crossword Genius

Great friend in shot ignores them (6,9)

Ross

I believe the answer is:

really something

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

'great friend in shot ignores them' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'great friend in shot ignores them' is the wordplay.
I cannot really understand how this works, but
'great' could be 'g' (abbreviation in place names) and 'g' is present in the answer.
'friend' could be 'ally' (an ally is a friend or supporter) and 'ally' is found within the answer.
'in' is found in the answer.
an anagram of 'them' is 'meth' which is within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Daily Express.
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