What does the cryptic crossword clue "Eritrea's onslaught providing cover for rebellion (7)" mean?

The definition is "rebellion". The wordplay uses a hidden word. Hidden in "eriTREA'S ONslaught providing cover for rebellion" The answer is TREASON.

Eritrea's onslaught providing cover for rebellion (7)

Times Cryptic #28985 | 21 Down | 2024-08-02 flower