What does the cryptic crossword clue "Big characters from [Sunday Times Times] and (7)" mean?

The wordplay uses a charade (building blocks). ST (synonym="ST") + AND (synonym="AND") + BY (synonym="BY") = STANDBY The answer is STANDBY.

Big characters from [Sunday Times Times] and (7)

Independent Cryptic #11632 | 19 Down | 2024-01-22 flower