You're blind, so no fantastic get-together (3,4,7)

I believe the answer is:

old boys reunion

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

'get-together' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?

'you're blind so no fantastic' is the wordplay.
'fantastic' is an anagram indicator (a fantastic or improbable ordering of the letters).
'youre'+'blind'+'so'+'no'='youreblindsono'
'youreblindsono' with letters rearranged gives 'OLD BOYS REUNION'.

Can you help me to learn more?

I've seen this clue in The Guardian.

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