The most common and most likely answer to this crossword clue is the 10 letter word PASTRYCOOK
I've seen this crossword clue in The Times
P
A
S
T
R
Y
C
O
O
K
Buddy explains!

The straight part
We know that "Baker’s" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case baker’s = pastrycook.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PASTRYCOOK mean?
PASTRYCOOK noun- A cook who makes desserts and pastries.