What does the cryptic crossword clue "Piece from electioneer, I established, most weird (7)" mean?

The definition is "most weird". The wordplay uses a hidden word. Hidden in "piece from electionEER, I ESTablished, most weird" The answer is EERIEST.

Piece from electioneer, I established, most weird (7)

Guardian Cryptic #29664 | 8 Down | 2025-04-09 flower