The most common and most likely answer to this crossword clue is the 10 letter word RE‑ELECTED
I've seen this crossword clue in The Guardian
R
E
â
€
‘
E
L
E
C
T
E
D
Buddy explains!
The straight part
We know that "returned to office" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case returned to office = re‑elected.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 RE‑ELECTED mean?
RE‑ELECTED verb- To elect for a second or subsequent time.