Crossword Genius

With justification, figure to get fit (7)

Ross

I believe the answer is:

tenable

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

'with justification figure to get fit' is the definition.
I can't tell whether this definition defines the answer.

'figure to get fit' is the wordplay.
I cannot quite understand how this works, but
'figure' could be 'ten' (ten is a number or figure) and 'ten' is found within the answer.
'fit' could be 'able' (similar in meaning) and 'able' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for tenable that I've seen before include "okay as regards defence" , "Well-founded" , "Can be maintained" , "Viable" , "Capable of being kept" .)

I've seen this clue in the Evening Standard.
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