The most common and most likely answer to this crossword clue is the 10 letter word CUSTOMISED
I've seen this crossword clue in The Times
C
U
S
T
O
M
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D
More clues leading to the result CUSTOMISED
Buddy explains!

The straight part
We know that "Tailored" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case tailored = customised.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.