Bait — is that eyed? (6)
I believe the answer is:
needle
This clue is a double definition.
'bait' is the first definition.
(thesaurus)
'is that eyed?' is the second definition.
(the hole in a needle is its eye)
(Other definitions for needle that I've seen before include "It indicates the reading on a measuring instrument" , "Rile" , "Persistently annoy" , "Provocation" , "Bug" .)