What does the cryptic crossword clue "Is this wanderer sane? (5)" mean?

The definition is "wanderer". The wordplay uses a charade (building blocks). NO (synonym="NO") + MAD (synonym="sane") = NOMAD The answer is NOMAD.

Is this wanderer sane? (5)

Guardian Cryptic #29052 | 3 Down | 2023-04-24 flower