Communicate false info about mafiosi, periodically (6)
I believe the answer is:
liaise
'communicate' is the definition.
(I've seen this before)
'false info about mafiosi periodically' is the wordplay.
'false info' becomes 'lie' (I can't explain this - if you can you should believe this answer much more).
'about' indicates putting letters inside.
'periodically' indicates alternate letters (letters must be selected 'every so often').
The alternate letters of 'mafiosi' are 'ais'.
'lie' placed around 'ais' is 'LIAISE'.
Can you help me to learn more?
(Other definitions for liaise that I've seen before include "Act as a link between groups" , "Form a link (with)" , "Communicate with for mutual benefit" , "Foster co-operation" , "Work together" .)