The most common and most likely answer to this crossword clue is the 8 letter word GROCER’S
I've seen this crossword clue in The Guardian
G
R
O
C
E
R
â
€
™
S
Buddy explains!
The straight part
We know that "Type of apostrophe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case type of apostrophe = grocer’s.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 GROCER’S mean?
GROCER’S noun- A person who retails groceries (foodstuffs and household items) from a grocery.