The most common and most likely answer to this crossword clue is the 7 letter word DOWAGER
I've seen this crossword clue in The Daily Telegraph
D
O
W
A
G
E
R
More clues leading to the result DOWAGER
- Plea from bookie's lady whose partner's late
- Bet on party for distinguished old lady
- Undertake bet for titled widow
- Dignified female author holding sway
- Manage venture for widow
- Active sort about to shake grand old woman
- Noblewoman‘s party venture
- Advice ignored by the risk-averse woman of property?
- War god confused about English widow
- Female dignitary outside in Oxford returned punt
Buddy explains!

The straight part
We know that "Lady whose husband’s gone" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lady whose husband’s gone = dowager.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 DOWAGER mean?
DOWAGER noun- A widow holding property or title derived from her late husband
- Any lady of dignified bearing