The most common and most likely answer to this crossword clue is the 14 letter word TECHNICALITIES
I've seen this crossword clue in Independent
T
E
C
H
N
I
C
A
L
I
T
I
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S
Buddy explains!
The straight part
We know that "minor details" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case minor details = technicalities.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 TECHNICALITIES mean?
TECHNICALITIES noun- The quality or state of being technical.
- That which is technical, or peculiar to any trade, profession, sect, or the like.
- A seemingly insignificant detail with unexpected consequences