Appointment of fool, one little good to country (11)

I believe the answer is:

assignation

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'appointment' is the definition.
(thesaurus)

'of fool one little good to country' is the wordplay.
'of fool' becomes 'assi' (I can't justify this - if you can you should believe this answer much more).
'one little' says to take the initial letters.
'to country' becomes 'nation' ('nation' can be a synonym of 'country').
The initial letter of 'good' is 'g'.
'assi'+'g'+'nation'='ASSIGNATION'

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(Other definitions for assignation that I've seen before include "clandestine meeting" , "Secret meeting" , "Secret rendezvous" , "The date" , "Go in as saint (anag.)" .)

I've seen this clue in The Telegraph.

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