What does the cryptic crossword clue "‘Firm has sacked man’ – journalist’s submission to editor? (4)" mean?

The wordplay uses a deletion. COP (deletion) + Y (deletion) = COPY The answer is COPY.

‘Firm has sacked man’ – journalist’s submission to editor? (4)

Guardian Cryptic #29537 | 22 Down | 2024-11-11 flower