Yak (3)
'yak' is the definition.
(I know that yak can be written as gab)
This is the entire clue.
(Other definitions for gab that I've seen before include "rabbit" , "Talk at length, chatter" , "Natter" , "The Irish are said to have the gift of it" , "The gift of the - means verbal fluency" .)
'yak' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for chat that I've seen before include "Tom in 22 [ALSACE]" , "One given to song" , "gas" , "A bird; converse" , "Talk informally; bird" .)