What does the cryptic crossword clue "Giant biblical character sweats, say (7)" mean?

The wordplay uses a charade (building blocks). OS (synonym="outsize, giant") + MOSES (synonym="biblical character") = OSMOSES The answer is OSMOSES.

Giant biblical character sweats, say (7)

Guardian Cryptic #29593 | 15 Across | 2025-01-16 flower