Cracker from a tube, possibly today's last (6)
'cracker' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'a tube possibly today's last' is the wordplay.
'possibly' is an anagram indicator.
'last' says to take the final letters.
The final letter of 'today' is 'y'.
'atube' is an anagram of 'beaut'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for beauty that I've seen before include "Truth, for Keats; She walks in it, Byron", "Period when power supply is unavailable", "very attractive lady", "Stunner", "She was wooed by the Beast".)