What does the cryptic crossword clue "One making a stir has to deal with blank look (5,4)" mean?

The wordplay uses a charade (building blocks). POKER (synonym="one making a stir") + FACE (synonym="deal with") = POKERFACE The answer is POKERFACE.

One making a stir has to deal with blank look (5,4)

Guardian Cryptic #29276 | 9 Across | 2024-01-11 flower