The most common and most likely answer to this crossword clue is the 7 letter word SEYMOUR
I've seen this crossword clue in The Guardian
S
E
Y
M
O
U
R
More clues leading to the result SEYMOUR
- Henry’s wife certainly upset when beheaded, love
- Jane maybe, in retrospect regrets keeping ring belonging to me
- Third wife has to be extra watchful, they say
- Albert distanced from royal muse confused for royal spouse
- Jane, for one, certainly upset before lament’s cut short
- … Bishop’s office again declared another Queen
- Queen to have extra time looking around, we hear?
- Hersh, perhaps asks people to keep talking
- Queen‘s Speech used by some to broaden one’s horizon
- Guy's name for what better observers do aloud?
Buddy explains!
The straight part
We know that "Third wife" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case third wife = seymour.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.