Republican plugs rigged election claim in post online (10,4)
I believe the answer is:
electronic mail
'post online' is the definition.
I can't judge whether this definition defines the answer.
'republican plugs rigged election claim' is the wordplay.
'republican' becomes 'R' (abbreviation in US politics).
'plugs' indicates putting letters inside (plug can mean to fill a gap).
'rigged' is an anagram indicator.
'election'+'claim'='electionclaim'
'electionclaim' anagrammed gives 'electonicmail'.
'r' going inside 'electonicmail' is 'ELECTRONIC MAIL'.
'in' is the link.
Can you help me to learn more?
(Other definitions for electronic mail that I've seen before include "Form of communication" , "message on screen?" .)