What does the cryptic crossword clue "Computer-controlled electric vehicles put in reverse (5)" mean?

The wordplay uses a reversal. TRAMS (reversal="‘electric vehicles’; a tram often is electric, but not necessarily so") = SMART The answer is SMART.

Computer-controlled electric vehicles put in reverse (5)

Guardian Cryptic #29633 | 26 Across | 2025-03-04 flower