Suggestion I'm no Titian is absurd! (10)

I believe the answer is:

intimation

'suggestion' is the definition.
(intimation is a kind of suggestion)

'i'm no titian is absurd' is the wordplay.
'is absurd' is an anagram indicator.
'im'+'no'+'titian'='imnotitian'
'imnotitian' with letters rearranged gives 'INTIMATION'.

I've seen this clue in The Guardian.

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