One brother returned some waders? (4)

I believe the answer is:

ibis

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'one brother returned some waders?' is the definition.
I can't tell whether this definition defines the answer.

'one brother returned' is the wordplay.
'one' becomes 'i' (Roman numeral).
'brother' becomes 'sib' (short for sibling).
'returned' is a reversal indicator.
'sib' backwards is 'bis'.
'i'+'bis'='IBIS'

Can you help me to learn more?

(Other definitions for ibis that I've seen before include "Flier" , "Bird, sacred to ancient Egyptians" , "Wading bird of tropical waters" , "Glossy wading bird" , "Large wader" .)

I've seen this clue in The Telegraph.

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