What does the cryptic crossword clue "Ruler suppressed in Communist's ardour (4)" mean?

The definition is "Ruler". The wordplay uses a hidden word. Hidden in "ruler suppressed in communisT'S ARdour" The answer is TSAR.

Ruler suppressed in Communist's ardour (4)

Times Cryptic #29153 | 6 Across | 2025-02-14 flower