Listen out for bays (6)
I believe the answer is:
inlets
'for bays' is the definition.
(I've seen this in another clue)
'listen out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'listen' anagrammed gives 'INLETS'.
(Other definitions for inlets that I've seen before include "Silent as sea entries to land" , "Small arms off larger bodies of water" , "Silent strips of water" , "Narrow channels of water running from sea or river" , "Silent kind of water channels" .)