What does the cryptic crossword clue "Get down from there and stop pulling my leg (4,3,2)" mean?

The definition is "Get down from there and stop pulling my leg". The wordplay uses a cryptic definition. Cryptic definition The answer is COMEOFFIT.

Get down from there and stop pulling my leg (4,3,2)

Guardian Cryptic #29004 | 1 Across | 2023-02-27 flower