Talk a lot (3)
I believe the answer is:
gab
'talk a lot' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gab that I've seen before include "The Irish are said to have the gift of it" , "Talk a lot" , "The gift of the . . . is ability to talk fluently" , "gossip" , "This may be a gift" .)