Crossword Genius

Recorded fragment about tailless bird (8)

Ross

I believe the answer is:

enrolled

'recorded' is the definition.
(to enrol is to record or register)

I don't understand how the rest of the clue works.

(Other definitions for enrolled that I've seen before include "Became a member" , "Registered,entered" , "being on board submarine?" , "The E in SEN" , "Admitted" .)

I've seen this clue in The Independent.
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