The most common and most likely answer to this crossword clue is the 11 letter word TRANSPORTED
I've seen this crossword clue in The Daily Telegraph
T
R
A
N
S
P
O
R
T
E
D
Buddy explains!

The straight part
We know that "Euphoric/bore" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case euphoric/bore = transported.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 TRANSPORTED mean?
TRANSPORTED verb- To carry or bear from one place to another; to remove; to convey.
- To deport to a penal colony.
- To move (someone) to strong emotion; to carry away.