An identical twin of fourteen? You're so right! (4)

I believe the answer is:

sort

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

'an identical twin of fourteen? you're' is the definition.
I can't tell whether this definition defines the answer.

'so right' is the wordplay.
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'so'+'rt'='SORT'

Can you help me to learn more?

(Other definitions for sort that I've seen before include "choice of characters frequently used in statistics" , "Kind, type or make" , "Tidy" , "Work out" , "Arrange systematically" .)

I've seen this clue in the Evening Standard.

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