Crossword Genius

In the formation, a flier is to create a pattern (4,4)

Ross

I believe the answer is:

fair isle

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'a pattern' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?

'in the formation a flier is to' is the wordplay.
'a flier is' can be anagrammed to 'FAIR ISLE'.
But, I am not sure how the anagram is indicated.

'create' acts as a link.

Can you help me to learn more?

(Other definitions for fair isle that I've seen before include "Source of knitwear" , "Type of knitwear design" , "Traditional knitwear design" , "British shipping forecast area - style of knitwear" , "Jumper" .)

I've seen this clue in the Evening Standard.
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