What does the cryptic crossword clue "Rail or boat my two substitutes for route around city (15)" mean?

The wordplay uses an anagram. anagram of RAIL + OR + BOAT + MY + TWO = ORBITALMOTORWAY The answer is ORBITALMOTORWAY.

Rail or boat my two substitutes for route around city (15)

Independent Cryptic #1844 | 6 Down | 2025-06-29 flower