What does the cryptic crossword clue "Cockney's hurt by stone in nasty place (6)" mean?

The definition is "place". The wordplay uses a charade (building blocks). ARM (synonym="h") + PIT (synonym="PIT") = ARMPIT The answer is ARMPIT.

Cockney's hurt by stone in nasty place (6)

Independent Cryptic #11644 | 26 Across | 2024-02-05 flower