1. Pension alternatives, for short → IRAS
5. Hustle → SCAM
9. "Odds are ..." → IDBET
14. Drive around the office? → WORKETHIC
16. Actress Watts of "Mulholland Drive" → NAOMI
17. Bahamians and Bahrainis → ISLANDERS
18. Speedboat's speed → KNOTS
19. Fake account → LIE
20. Dead ends? → DEES
21. James in the National Rhythm & Blues Hall of Fame → RICK
22. Piano études, essentially → LESSONS
24. Not above → BENEATH
27. Trusty → TRIEDANDTRUE
29. Alternative to a fingerprint, maybe → PASSCODE
30. Golfer McIlroy, the first European male to achieve a career Grand Slam → RORY
31. Actress ___ Marsay of Disney+'s "Andor" → FAYE
32. The Jazz, on sports tickers → UTA
33. Coming ___ → SOON
34. Small band → TRIO
35. Jazz pianist with a memorable recording of "Tea for Two" → ARTTATUM
37. Plant eater? → VENUSFLYTRAP
39. What the British call people who make crosswords → SETTERS
40. Prepared statement? → IMREADY
44. One-named rock idol who was born Paul David Hewson → BONO
45. Locking horns → ATIT
46. Guess alternative → LEE
47. Vegges out → LOAFS
49. Restaurant sommelier's offering → HOUSEWINE
51. Foundational skateboard trick → OLLIE
52. Doesn't exactly ham it up → UNDERACTS
53. Sings (out) → BELTS
54. Stereotypical eye-roller → TEEN
55. Informal get-together → SESH