What does the cryptic crossword clue "Step in time, free rein when dancing to provide entertainment (9)" mean?

The definition is "Step in". The wordplay uses an anagram. anagram of T FREE REIN = INTERFERE; definition: "Step in" The answer is INTERFERE.

Step in time, free rein when dancing to provide entertainment (9)

Guardian Cryptic #29080 | 12 Across | 2023-05-26 flower