Crossword Genius

Titian's day quite ruined after rejection of queen to adopt a pose for effect (12)

Ross

I believe the answer is:

attitudinise

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

'pose for effect' is the definition.
'attitudinise' can be an answer for 'pose' (attitudinising is a kind of posing). I am not sure about the 'for effect' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

I've seen this clue in The Independent.
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