Flighty type consumed by attitude (3)

I believe the answer is:

tit

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'flighty type' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

'consumed by attitude' is the wordplay.
'consumed by' says the answer is hidden in the clue (I've seen this in other clues).
'TIT' is hidden within 'attitude'.

Can you help me to learn more?

(Other definitions for tit that I've seen before include "Boob made backing" , "Small bird that lives off insects" , "useless horse, or not?" , "Small garden bird" , "18's [BIRD]" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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