What does the cryptic crossword clue "Enclosed area needing parking space (3)" mean?

The definition is "Enclosed area". The wordplay uses a charade (building blocks). P (synonym="arking") + EN (synonym="EN") = PEN The answer is PEN.

Enclosed area needing parking space (3)

Independent Cryptic #11878 | 13 Across | 2024-11-04 flower