3. Corona days:Nine at Nine

Nine: Comes from 5 + 4
Nine: A perfect square
Nine: Lives for a cat
Nine: Lives by Aerosmith
Nine: The cloud to be on
Nine: Planet in days bygone
Nine: Number of yards in whole
Nine: Dante's circles of hell
Nine: DD's serial time
Nine: Saved by a stitch in time
Nine: Rings of power
Nine: Flourine's atomic number
Nine: Members in the fellowship
Nine: Is six downside up
Nine: Nazgûl or Ringwraiths
Nine: In my birthday dates
Nine: At the end of my first decade
Nine: Virtues of Buddha
Nine: Nights of Navarathri
Nine: Sivajis in Navarathri
Nine: Ratnas in Navaratna
Nine: Celestial in Navagraha
Nine: Months of pregnancy
Nine: Years in a big company
Nine: Revolutions by Beatles
Nine: Inch Nails
Nine: No bigger single digit integer
Nine: In the cost of a Bata slipper
Nine: To Five no longer
Nine: A Prithviraj Thriller
Nine minutes at Nine