What does the cryptic crossword clue "Dated northern town losing last plant in the end (3,3)" mean?

The definition is "Dated". The wordplay uses a deletion. OLDHA (deletion) + T (deletion) = OLD HAT; definition: "Dated" The answer is OLD HAT.

Dated northern town losing last plant in the end (3,3)

Times Cryptic #29217 | 20 Down | 2025-04-30 flower