What does the cryptic crossword clue "On edge seeing Venus, or agitated (7)" mean?

The definition is "On edge". The wordplay uses an anagram. anagram of VENUS, + OR = NERVOUS; definition: "On edge" The answer is Nervous.

On edge seeing Venus, or agitated (7)

Telegraph Prize Cryptic #3072 | 17 Down | 2020-09-06 flower