The short answer: probably not. Even if the Milwaukee Bucks’ 50 clutch minutes this year (72 if adjusted for a full season) would be the fewest since the NBA started tracking the stat in 1996, significantly-smarter-than-me stat folks have already broken down that clutch play in the regular season does not necessarily correlate to clutch play in the postseason. From this piece over at Nylon Calculus:
...This is reflective of a larger point: clutch stats are noisy and often shift wildly from year to year. The year-to-year correlation of team clutch ratings, when adjusted for overall point differential, is virtually zero.