Periodical food for chatterer (6)
I believe the answer is:
magpie
'chatterer' is the definition.
(I've seen this before)
'periodical food' is the wordplay.
'periodical' becomes 'mag' (abbreviation for magazine).
'food' becomes 'pie' (pie is a kind of food).
'mag'+'pie'='MAGPIE'
'for' acts as a link.
(Other definitions for magpie that I've seen before include "One on target" , "Bird of the crow family" , "Long-tailed crow" , "1 [UNLUCKY FOR SOME]" , "Black and white bird, known as thieving" .)