Huge Arabian bird’s tail not seen on stone (3)
I believe the answer is:
roc
'huge arabian bird's' is the definition.
'roc' can be an answer for 'bird's' (mythological bird of prey). I'm not sure about the 'huge arabian' bit.
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for roc that I've seen before include "Gigantic bird of eastern legend - cor!" , "Huge mythical bird of prey" , "Enormous legendary bird" , "Enormous, mythical bird of prey" , "Vast legendary bird" .)