Each tile belongs to at least one as-yet-unknown category but which belongs where and why?
The Venn diagram should be resolved like this:
The ellipses represent:
Left: Trees, once the initial 'S' is removed
(S)ASH, (S)OAK, (S)PEAR, (S)TEAK
Right: Food items, once the initial 'S' is removed
(S)CREAM, (S)HAM, (S)MASH, (S)PEAR, (S)TART, (S)TRIPE
(S)PEAR is the only item appearing in the central crossover section, with 'PEAR' being both the name of a tree and the name of its fruit.
As for the title:
There are so many hints hidden here! 'Bark' suggests trees, 'Bite' suggests something to eat, 'Starts' is a reference to initial letters, and 'The Queen of Starts' is a veiled reference to the nursery rhyme in which 'The Queen of Hearts, she made some tarts...' with 'tart' here being one of the hidden words.
1$\begingroup$ Bravo - I knew the second I pressed send who it would be!!! $\endgroup$ Jun 28, 2022 at 20:10
$\begingroup$ And in Alice in Wonderland, the Queen of Hearts is noted for chopping off heads, here the initial letters 'S'. (Also, we're chopping off the "start" of each word.) $\endgroup$ Jun 29, 2022 at 14:06