One could make jumper in Argyle knit (8)

I believe the answer is:

yearling

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'one could make jumper' is the definition.
I can't tell whether this defines the answer.

'in argyle knit' is the wordplay.
'knit' is an anagram indicator (I've seen 'knitting' mean this).
'in'+'argyle'='inargyle'
'inargyle' is an anagram of 'YEARLING'.

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(Other definitions for yearling that I've seen before include "Racehorse that is 12 months old" , "Youngster" , "Twelve-month old animal" , "A racehorse under 2" , "Animal in its second 12 months" .)

I've seen this clue in The Sun.

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