The most common and most likely answer to this crossword clue is the 6 letter word TALLER
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More clues leading to the result TALLER
Buddy explains!

The straight part
We know that "more fanciful" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more fanciful = taller.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 TALLER mean?
TALLER adjective- (of a person) Having a vertical extent greater than the average. For example, somebody with a height of over 6 feet would generally be considered to be tall.
- (of a building, etc.) Having its top a long way up; having a great vertical (and often greater than horizontal) extent; high.
- (of a story) Hard to believe, such as a tall story or a tall tale.
- (of a cup of coffee) A cup of coffee smaller than grande, usually 8 ounces.
- Obsequious; obedient.
- Seemly; suitable; fitting, becoming, comely; attractive, handsome.
- Bold; brave; courageous; valiant.
- Fine; proper; admirable; great; excellent.