What does the cryptic crossword clue "Oust top rogue, settlement far off (7)" mean?

The definition is "off". The wordplay uses an anagram. anagram of OUST + TOP = OUTPOST; definition: "settlement far off" The answer is Outpost.

Oust top rogue, settlement far off (7)

Telegraph Prize Cryptic #3005 | 5 Down | 2019-05-26 flower