The most common and most likely answer to this crossword clue is the 12 letter word CUSTOM-BUILT
I've seen this crossword clue in The Times
C
U
S
T
O
M
-
B
U
I
L
T
Buddy explains!

The straight part
We know that "made to order" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case made to order = custom-built.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 CUSTOM-BUILT mean?
CUSTOM-BUILT adjective- Built according to the specifications of a particular individual.