What does the cryptic crossword clue "Record of extra time after taking circuitous route? (9)" mean?

The wordplay uses an anagram. anagram of EXTRA (synonym="EXTRA") + TIME (synonym="TIME") = TAXIMETER The answer is TAXIMETER.

Record of extra time after taking circuitous route? (9)

Guardian Cryptic #29460 | 27 Across | 2024-08-13 flower