Turn of phrase endlessly quoted, flipping silly (7)

I believe the answer is:

idiotic

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'silly' is the definition.
(I've seen this before)

'turn of phrase endlessly quoted flipping' is the wordplay.
'turn of phrase' becomes 'idiom' (I've seen this before).
'endlessly' means to remove the last letter.
'quoted' becomes 'cit' (I am not sure about this - if you are sure you should believe this answer much more).
'flipping' says the letters should be written backwards.
'cit' reversed gives 'tic'.
'idiom' with its last letter taken off is 'idio'.
'idio'+'tic'='IDIOTIC'

Can you help me to learn more?

(Other definitions for idiotic that I've seen before include "Inviting ridicule" , "Mindless" , "Half witted" , "Silly" , "Fatuous" .)

I've seen this clue in The Independent.

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