Crossword Genius

Affirmation of Britishness? (3)

Ross

I believe the answer is:

tis

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

'affirmation' is the definition.
Although both the answer and definition are nouns, they are not in the same form of the noun.

'of britishness?' is the wordplay.
'of' indicates the answer is hidden within the clue.
'TIS' is hidden in the letters of 'britishness'.

Can you help me to learn more?

(Other definitions for tis that I've seen before include "For poet, that's" , "McCourt work" , "That thing's" , "Sequel to "Angela's Ashes"" , "I confirm the identity of" .)

I've seen this clue in the Evening Standard.
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