The most common and most likely answer to this crossword clue is the 7 letter word DEVISED
I've seen this crossword clue in The Daily Telegraph
D
E
V
I
S
E
D
More clues leading to the result DEVISED
Buddy explains!

The straight part
We know that "made up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case made up = devised.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 DEVISED mean?
DEVISED verb- To use one's intellect to plan or design (something).
- To leave (property) in a will.
- To form a scheme; to lay a plan; to contrive; to consider.
- To plan or scheme for; to plot to obtain.
- To imagine; to guess.