Cryptic crossword clue
No case for paper cup in this outline 6

The most common and most likely answer to this crossword clue is the 6 letter word APERCU

I've seen this crossword clue in Financial Times
A
P
E
R
C
U


Buddy explains!

The straight part
We know that "this outline" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case this outline = apercu.
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 APERCU mean?

APERCU noun
  1. A clever insight.
  2. A summary or outline; words that summarize.

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