The most common and most likely answer to this crossword clue is the 5 letter word FOLLY
I've seen this crossword clue in Independent
F
O
L
L
Y
More clues leading to the result FOLLY
Buddy explains!
The straight part
We know that "Gothic building/in which there’s a lack of reflection" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gothic building/in which there’s a lack of reflection = folly.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 FOLLY mean?
FOLLY noun- Foolishness.
- Thoughtless action resulting in tragic consequence.
- A fanciful building built for purely ornamental reasons.