Crossword Genius

Perform a double act with a bird (4)

Ross

I believe the answer is:

dodo

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

'bird' is the definition.
(dodo is a kind of bird)

'perform a double act' is the wordplay.
'perform' becomes 'do' (both can mean complete an action).
'a double act' becomes 'do' (to do is to act or execute a task. I am not sure about the 'double' bit.).
'do'+'do'='DODO'

'with a' acts as a link.

Can you help me to learn more?

(Other definitions for dodo that I've seen before include "Proverbially extinct bird" , "bird long dead" , "Idiot" , "Bird (whose style of very out of fashion)" , "Old bird" .)

I've seen this clue in the Evening Standard.
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