OMG: T-shirt's ripped at far end (9)

I believe the answer is:

rightmost

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'far end' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'omg t-shirt's ripped' is the wordplay.
'ripped' indicates anagramming the letters (letters ripped or torn up).
'omg'+'t'+'shirt'='omgtshirt'
'omgtshirt' with letters rearranged gives 'RIGHTMOST'.

'at' acts as a link.

Can you help me to learn more?

(Another definition for rightmost that I've seen is " At one political extreme".)

I've seen this clue in The Times.

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