Crossword Genius

Father holding big bird's thigh bone (5)

Ross

I believe the answer is:

femur

'thigh bone' is the definition.
(I've seen this before)

'father holding big bird's' is the wordplay.
'father' becomes 'fr' (abbreviation as in a priest's title).
'holding' is an insertion indicator.
'big bird' becomes 'emu' (type of large bird).
'fr' enclosing 'emu' is 'FEMUR'.

(Other definitions for femur that I've seen before include "Part of leg" , "Bone in leg" , "Thighbone" , "bit of leg" , "Longest bone in the human body" .)

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