Cryptic crossword clue
Shows up group 1D

The most common and most likely answer to this crossword clue is the 7 letter word DENOTES

I've seen this crossword clue in The Guardian
D
E
N
O
T
E
S

Buddy explains!

The straight part
We know that "Shows up" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shows up = denotes.
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 DENOTES mean?

DENOTES verb
  1. To indicate; to mark.
  2. To make overt.
  3. To refer to literally; to convey as meaning.

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