Crossword Genius

Banks expertise evident if one backs fiscal hub? (3-2)

Ross

I believe the answer is:

sci-fi

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

'banks expertise' is the definition.
The definition suggests a singular noun which matches the answer.

'if one backs fiscal hub?' is the wordplay.
'one' becomes 'i' (Roman numeral).
'backs' is a charade indicator (letters next to each other).
'fiscal hub?' becomes 'sc' (I can't justify this - if you can you should believe this answer much more).
'if'+'i'='ifi'
'ifi' put after 'sc' is 'SCI-FI'.

'evident' is the link.

Can you help me to learn more?

(Other definitions for sci-fi that I've seen before include "Sort of book" , "Literary genre (abbrev)" , "Doctor Who genre" , "Fantasy genre based in the future" , "Fiction genre of Philip K. Dick" .)

I've seen this clue in the Sydney Morning Herald.
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