The most common and most likely answer to this crossword clue is the 8 letter word VISIGOTH
I've seen this crossword clue in The Guardian
V
I
S
I
G
O
T
H
More clues leading to the result VISIGOTH
- Germanic aggressor once shot during stay at hospital
- Unwelcome invader to stay in hotel — try to intervene
- Member of tribe settling in Toulouse – see one leave aboard this at sea
- Energy in call by hard member of tribe
- Old 22 down‘s trip includes travel on horse
- Go to hospital carrying game ‘Invader’
- Barbarian’s game interrupts call to hospital
- Frequent tours become hard for invader of Roman Empire
Buddy explains!
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.