What does the cryptic crossword clue "Source of theatrical effect – risk bringing in railway (3,3)" mean?

The wordplay uses a container (one word inside another). RY (synonym="railway") in DICE (synonym="to gamble=") = DRYICE The answer is DRYICE.

Source of theatrical effect – risk bringing in railway (3,3)

Guardian Cryptic #29353 | 8 Down | 2024-04-10 flower