What does the cryptic crossword clue "Rambling on downs and upland (7)" mean?

The definition is "upland". The wordplay uses an anagram. anagram of ON + DOWNS = SNOWDON; definition: "upland" The answer is SNOWDON.

Rambling on downs and upland (7)

Times Cryptic #28993 | 18 Down | 2024-08-12 flower