The most common and most likely answer to this crossword clue is the 6 letter word PERSIA
I've seen this crossword clue in The Sunday Telegraph
P
E
R
S
I
A
More clues leading to the result PERSIA
- A company guarding one’s back in old empire
- Old country entertained by bagpipers I assembled
- Old country dance's back in Paris, surprisingly
- Old country prospers, I assume, with several outsiders banished
- Reconstituted spare parts for Everyman in the old country
- Some lepers I abandoned in ancient land
- Some interlopers I accosted in home of 27, originally
- Wrongly praise ancient empire
- A spire high in ancient Iran
- Somehow aspire for Iran of yore
Buddy explains!

The straight part
We know that "home of 27, originally" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case home of 27, originally = persia.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.