What does the cryptic crossword clue "Marketeers showing enthusiasm to drink beers (5,4)" mean?

The wordplay uses a container (one word inside another). ALES (synonym="ALES") in STEAM (synonym="STEAM") = SALESTEAM The answer is SALESTEAM.

Marketeers showing enthusiasm to drink beers (5,4)

Guardian Cryptic #29366 | 30 Across | 2024-04-25 flower