Informer regularly talked to confuse (6)
I believe the answer is:
rattle
'confuse' is the definition.
(I know that confuse is a more specific form of the action abash)
'informer regularly talked' is the wordplay.
'informer' becomes 'rat' (synonyms).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternate letters of 'talked' are 'tle'.
'rat'+'tle'='RATTLE'
'to' is the link.
(Other definitions for rattle that I've seen before include "Baby's toy - conductor" , "Noisy baby's toy" , "rabbit" , "Trivial talk" , "Put out" .)