What does the cryptic crossword clue "Engaged in ceasefire, ignoring command (5)" mean?

The definition is "command". The wordplay uses a hidden word. Hidden in "engaged in ceasefiRE, IGNoring command" The answer is REIGN.

Engaged in ceasefire, ignoring command (5)

Guardian Cryptic #28140 | 26 Across | 2020-05-22 flower