One of a predatory, grasping set (5)
I believe the answer is:
talon
'predatory grasping set' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'one of a' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
'a' is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for talon that I've seen before include "Tonal (anag.)" , "Eagle claw" , "One hooked on bird" , "Eg, an eagle's claw" , "E.g. hawk's claw" .)