Crossword Genius

To burden the fit, fiscally (7)

Ross

I believe the answer is:

taxable

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

'to burden the fit fiscally' is the definition.
I can't tell whether this definition defines the answer.

'to burden the fit' is the wordplay.
'to burden' becomes 'tax' (I've seen this in another clue).
'the fit' becomes 'able' (I've seen this before).
'tax'+'able'='TAXABLE'

Can you help me to learn more?

(Another definition for taxable that I've seen is " Subject to levy".)

I've seen this clue in the Evening Standard.
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