Anybody single (3)
I believe the answer is:
one
This clue is a double definition.
'anybody' is the first definition.
(I've seen this in another clue)
'single' is the second definition.
(a single thing - only one)
(Other definitions for one that I've seen before include "Single person or thing" , "Half of two" , "Sole; identical" , "Ace" , "Lowest cardinal number" .)