What does the cryptic crossword clue "Criminal in Perth or Cumbrian town (7)" mean?

The definition is "Cumbrian town". The wordplay uses an anagram. anagram of IN + PERTH = PENRITH; definition: "Cumbrian town" The answer is PENRITH.

Criminal in Perth or Cumbrian town (7)

Daily Mail Cryptic #17161 | 1 Down | 2023-08-11 flower