entryism

Previously spelt entrism, borrowed from French entrisme but reconstructed as entry +‎ -ism.

entryism (uncountable)

1. A political tactic by which an organisation or state encourages its members or agents to infiltrate another organisation in an attempt to gain recruits or to encourage an unelectable candidate.
   • 2018 August 19, Heather Stewart, “Brexit: Tory MPs warn of entryism threat from Leave.EU supporters”, in The Guardian‎, →ISSN:

     Conservative MPs are warning of a risk of entryism in the party as the pro-Brexit group Leave.EU encourages its supporters to become members in order to back Boris Johnson or Jacob Rees-Mogg in a future leadership contest.

• entryist

• misentry