What does the cryptic crossword clue "Car's kit shifted, first say switched up? (4,5)" mean?

The wordplay uses an anagram. anagram of EG (synonym="say") + CARS (synonym="CARS") + KIT (synonym="KIT") = GEARSTICK The answer is GEARSTICK.

Car's kit shifted, first say switched up? (4,5)

Guardian Cryptic #29273 | 4 Down | 2024-01-08 flower