This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 粰 is uncertain. It combines 米 (rice) with 孚, but the role of 孚 is unclear.
With 米 (rice) on the left, 粰 likely relates to rice or grain, but the specific meaning is unclear. The right side 孚 suggests a phonetic role, but no clear mnemonic emerges.
For フウ, imagine a puff of wind (風, ふう) blowing through rice grains: 風 -> フウ, and the rice (米) is scattered by the wind.