Support fool, one with attitude (10)

I believe the answer is:

assistance

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'support' is the definition.
(thesaurus)

'fool one with attitude' is the wordplay.
'fool one with' becomes 'assi' (I can't explain this - if you can you should give a lot more credence to this answer).
'attitude' becomes 'stance' (stance is a kind of attitude).
'assi'+'stance'='ASSISTANCE'

Can you help me to learn more?

(Other definitions for assistance that I've seen before include "Help" , "Support" , "Aid" .)

I've seen this clue in The Telegraph.

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