The most common and most likely answer to this crossword clue is the 7 letter word JERICHO
I've seen this crossword clue in The Guardian
J
E
R
I
C
H
O
More clues leading to the result JERICHO
- Joe’s excited touring sumptuous old city
- Joe wanders around lavish old city
- First person in France to get decorated over defeated city
- Place wrecked by heroic Joshua, originally
- First persons in Europe to welcome leader of regime, old, old city
- Judge’s heroic, if agitated, in Palestine
- In France, I love crossing wealthy city
- English with many possessions taken in by little woman in Middle Eastern town
- Jack enters organization originally accepting affluent, but remote posting
Buddy explains!

The straight part
We know that "Place wrecked by heroic Joshua, originally" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case place wrecked by heroic joshua, originally = jericho.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.