Crossword Genius

Basis for a uniquely balanced performance (8)

Ross

I believe the answer is:

unicycle

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

This clue might be a double definition.

'basis' is the first definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'uniquely balanced performance' is the second definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'for a' acts as a link.

Can you help me to learn more?

(Other definitions for unicycle that I've seen before include "Transport needing good balance" , "form of transport" , "One-wheeled vehicle driven by pedalling" , "One-wheeled transport" , "One-wheeled conveyance" .)

I've seen this clue in the Evening Standard.
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