Is in competition for six points (4)

I believe the answer is:

vies

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

'is in competition' is the definition.
I can't tell whether this definition defines the answer.

'six points' is the wordplay.
'six' becomes 'VI' (Roman numerals).
'points' becomes 'es' (two compass points).
'vi'+'es'='VIES'

'for' is the link.

Can you help me to learn more?

(Other definitions for vies that I've seen before include "Contends" , "Competes, carries on rivalry" , "Strives with, rivals" , "Struggles" .)

I've seen this clue in the Evening Standard.

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