What does the cryptic crossword clue "Feeling nervous as citadel now is ransacked (2,1,4,5)" mean?

The wordplay uses an anagram. anagram of AS + CITADEL + NOW = INACOLDSWEAT The answer is INACOLDSWEAT.

Feeling nervous as citadel now is ransacked (2,1,4,5)

Daily Mail Cryptic #17261 | 29 Across | 2024-01-01 flower